Cardiopulmonary Imaging Original Research
|
|
- Lynette Chase
- 6 years ago
- Views:
Transcription
1 Cardiopulmonary Imaging Original Research Bischoff et al. Versus Helical Mode for Coronary CTA Cardiopulmonary Imaging Original Research Bernhard Bischoff 1 Franziska Hein 1 Tanja Meyer 1 Markus Krebs 1 Martin Hadamitzky 1 Stefan Martinoff 2 Albert Schömig 1 Jörg Hausleiter 1 Bischoff B, Hein F, Meyer T, et al. Keywords: coronary artery disease, CT, prospective triggering, sequential scanning DOI: /AJR Received August 25, 2009; accepted after revision December 5, Klinik für Herz und Kreislauferkrankungen, Deutsches Herzzentrum Munchen, Lazarettstrasse 36, Munich, Bavaria 80636, Germany. Address correspondence to J. Hausleiter (hausleiter@dhm.mhn.de). 2 Institut für Radiologie und Nuklearmedizin, Deutsches Herzzentrum München, Klinik an der TU München, Munich, Germany. AJR 2010; 194: X/10/ American Roentgen Ray Society Comparison of and Helical Scanning for Radiation Dose and Image Quality: Results of the Prospective Multicenter Study on Radiation Dose Estimates of Cardiac CT Angiography (PROTECTION) I Study OBJECTIVE. Concerns have been raised about the radiation exposure of coronary CT angiography (CTA). Recently, a prospective ECG-triggered sequential coronary CTA technique was developed to reduce exposure to ionizing radiation. The purpose of this analysis was to determine the impact of a sequential scanning technique on image quality and radiation dose in a prespecified subgroup analysis of the Prospective Multicenter Study on Radiation Dose Estimates of Cardiac CT Angiography I (PROTECTION I) Study when compared with a standard helical scanning technique. MATERIALS AND METHODS. This analysis comprises MDCT coronary angiography studies of 47 international study sites in which the image quality was assessed by an experienced coronary CTA investigator using a 4-point score (1 = nondiagnostic, 4 = excellent image quality). Image quality was analyzed in all patients studied with the sequential scanning mode (n = 99) and in randomly selected patients of the population studied with the helical acquisition mode (n = 586). Radiation dose estimates were derived from the dose length product (DLP) and a conversion coefficient for the chest (0.014 msv mgy 1 cm 1 ). RESULTS. Although the sequential scanning mode significantly reduced radiation dose estimates by 68% from 11.2 msv for the helical mode to 3.6 msv for the sequential mode (p < 0.001), the median diagnostic image quality scores were comparable in both groups. The median diagnostic score for both scanning modes was 3.5 (interquartile range: sequential vs helical mode, vs , respectively; p = 0.62). CONCLUSION. The results of the PROTECTION I Study suggest that the prospective ECG-triggered sequential coronary CTA technique significantly reduces radiation dose without impairing image quality when compared with the standard retrospective helical data acquisition in patients with a low and stable heart rate. With improvements in the temporal and spatial resolution of CT, coronary CT angiography (CTA) has become a common diagnostic technique in clinical practice, particularly for the examination of patients with an intermediate pretest probability for obstructive coronary artery disease [1 3]. Nevertheless, there remains concern regarding the exposure to ionizing radiation and its potential hazards. The international Prospective Multicenter Study on Radiation Dose Estimates of Cardiac CT Angiography I (PROTECTION I) Study analyzed the extent of coronary CTA radiation dose estimates and the impact of different strategies to reduce dose in clinical practice [4]. The study showed that effective radiation exposure usually adds up to doses between 8 and 18 msv when performing 64-MDCT coro- nary angiography depending on the CT system, the scanning technique, and patientdependent factors [4]. For this reason, several dose-saving scanning techniques and algorithms have been developed. Usually, coronary CTA is performed using the retrospective ECG-gated helical scanning technique [1]. When compared with this helical image acquisition, the prospective ECG-triggered sequential scanning mode yields a considerable reduction of radiation dose. Originally, the prospective scanning algorithm was predominantly used for unenhanced calcium scoring. Recently, this scanning technique has been reintroduced into contrast-enhanced coronary CTA [5]. When applying the prospective ECG-triggered sequential scanning algorithm, image acquisition is performed only during a short predefined time period in the R-R interval, AJR:194, June
2 Bischoff et al. requiring a low and stable heart rate. Small single-center studies have indicated that in comparison with retrospective ECG-gated helical scanning, sequential scanning allows a significant reduction of the radiation dose without impairing image quality in adequately selected patients [6, 7]. The aim of this analysis was to compare the sequential scanning mode and the standard helical image acquisition in a large prospective multicenter and multivendor study with respect to image quality and radiation dose. Material and Methods Study Protocol The methods of the observational PROTEC- TION I Study have been described in detail elsewhere [4]. In brief, 50 international study sites provided image data and scanning protocols of 1,965 consecutive patients undergoing coronary CTA during 1 month. All data were collected and analyzed in a central coronary CTA core laboratory. All patients underwent coronary CTA for visualization of coronary arteries or bypass grafts, combined examination of the coronary and pulmonary arteries in patients with chest pain, or visualization of the cardiac anatomy before or after electrophysiologic procedures. The current analysis comprised only the examinations performed for visualization of the coronary arteries with a 64-MDCT system (n = 1,544 studies; sequential coronary CTA: n = 99; helical coronary CTA: n = 1,445). Of these patients, we included all patients scanned with a sequential scanning technique (n = 99, 100%) and a large group of randomly selected patients examined with helical CT (n = 586, 41%) in the current analysis. In these patients, image quality grading was performed. Because of the large number of patients, it was not practicable to obtain image quality in all patients examined with helical CT; therefore, a subgroup of these patients was randomly selected for image quality grading. The scanning protocol including the selection of the scanning mode was at the discretion of the performing physician. The study was approved by the ethics committee, and all patients gave written informed consent as required at the individual study sites. Image Quality To obtain objective indexes of image quality, the image noise, signal intensity, signal-to-noise ratio, and contrast-to-noise ratio were obtained for all coronary CTA examinations. The image noise was defined as the averaged SDs of the CT attenuation values (in Hounsfield units) inside two large regions of interest (ROIs) in the proximal segments of the left and right coronary arteries. The signal intensity was derived from the mean attenuation values measured in the same two ROIs. The signal-to-noise ratio was calculated as the mean CT attenuation values of the left and right coronary arteries divided by image noise. The contrast-to-noise ratio was defined as the difference between the mean CT attenuation values of the proximal coronary arteries and the mean density of the left ventricular wall, which was divided by image noise. An experienced coronary CTA core laboratory reader, who was blinded to coronary CTA acquisition details, determined image quality on a per-vessel basis. Image quality was determined by a score describing image quality of the four main coronary arteries left main, left anterior descending, left circumflex, and right coronary arteries based on a 4-point grading system. A score of 1 was defined as nondiagnostic and meant that impaired image quality precluded appropriate evaluation of the coronary arteries due to severe motion artifacts, extensive coronary calcifications, severe image noise, or insufficient contrast. A score of 2, defined as adequate, indicated that image quality was reduced because of artifacts due to motion, image noise, or low contrast attenuation but that image quality was still sufficient to rule out significant stenosis. A score TABLE 1: Patient and Scanning Characteristics Patient characteristics Characteristics of 3 was defined as good and was assigned when artifacts, caused by motion, image noise, coronary calcifications, or low contrast, did not interfere with assessment concerning the presence of luminal stenosis and the presence of calcified and noncalcified coronary atherosclerotic plaque. A score of 4, defined as excellent, indicated a complete absence of motion artifacts, strong attenuation of vessel lumen, and clear delineation of vessel walls and ability to assess luminal stenosis as well as plaque characteristics. All coronary CTA examinations with at least one coronary artery with nondiagnostic image quality (image quality score = 1) were rated nondiagnostic. Estimation of Radiation Dose The collected parameters relevant to radiation dose included the volume CT dose index (CTDI vol ) and dose length product (DLP), both of which were obtained from the CT scanning protocol of each coronary CTA study. The DLP was the primary study outcome parameter. For estimation of the effective dose, the product of the DLP and an organ weighting factor for the chest as the investigated anatomic region (k = msv (mgy cm) 1 averaged between male and female models) was calculated as proposed by the European Helical Mode No. of patients Mode Height, m 1.70 ( ) 1.72 ( ) Weight, kg 76.0 ( ) 75.0 ( ) Body mass index, kg/m ( ) 25.8 ( ) Heart rate, bpm 61 (55 69) 56 (52 61) < Sinus rhythm, no. (%) 568 (96.9) 98 (99.0) Scanning characteristics Scan length, mm 129 ( ) 139 ( ) < Tube voltage, kv 120 ( ) 120 ( ) 0.08 CT scanner < GE Healthcare 64-MDCT, a no. (%) 96 (16.4) 87 (87.9) Philips Healthcare 64-MDCT, b no. (%) 28 (4.8) 11 (11.1) Siemens Healthcare single-source 64-MDCT, c no. (%) 96 (16.4) 0 (0) Siemens Healthcare dual-source 64-MDCT, d no. (%) 334 (57.0) 1 (1.0) Toshiba 64-MDCT, e no. (%) 32 (5.5) 0 (0) Note Unless noted otherwise, data are presented as median (interquartile range). a LightSpeed VCT. b Brilliance 64. c Somatom Sensation. d Somatom Definition. e Aquilon 64. p 1496 AJR:194, June 2010
3 Versus Helical Mode for Coronary CTA Working Group for Guidelines on Quality Criteria in CT [8]. Statistical Analysis For selection of patients for the helical CT group, a random selection was performed using SPSS software (version , SPSS). To allow a sufficient size of the control group, approximately 40% of all helical coronary CTAs were selected, resulting in a control group of 40.5% of all patients examined with helical CT. All parameters of the sequential scanning protocol were compared with the standard helical image acquisition. Continuous variables were expressed as medians (interquartile range [IQR]) and were compared using the Wilcoxon s rank sum test. Categoric variables were expressed as frequencies or percentages. The chi-square test was used to test differences in the frequency of categoric variables. A p value of < 0.05 was considered statistically significant. All statistical analyses were performed using SPSS software (version ). Results A total of 685 patients undergoing 64- MDCT coronary angiography at 47 study sites were included in this analysis. Prospective ECG-triggered sequential image acquisition was performed in 99 patients, whereas 586 patients were examined using retrospective ECG-gated helical scanning. image acquisition was used in five of the 47 study sites. Table 1 summarizes patient and scanning characteristics, respectively, of both groups. The frequency of sinus rhythm, height, weight, and body mass index were comparable in both groups. Heart rate was significantly lower in patients scanned with the sequential mode than those examined with the standard helical mode (56 vs 61 beats per minute [bpm], respectively; p < 0.001). Furthermore, there was a significant difference regarding scanning length between both groups (139 and 129 mm for sequential and helical scanning mode, respectively; p < 0.001). When retrospective ECG-gated image acquisition was used, the median CTDI vol added up to 49.8 mgy (IQR, mgy). In contrast, in patients examined with the sequential scanning technique, the median CT- DI vol was significantly reduced to 18.4 mgy (IQR, mgy) (p < 0.001). Furthermore, sequential image acquisition led to a significantly reduced DLP when compared with standard helical scanning (median DLP [IQR], 259 mgy cm [ mgy cm] vs 801 mgy cm [563 1,091 mgy cm], respectively; p < 0.001), resulting in a 68% TABLE 2: Quantitative Image Quality Parameters Image Quality Parameters reduction of estimated radiation dose. This difference translates to a median estimated radiation dose of 3.6 msv (IQR, msv) versus 11.2 msv (IQR, msv) for sequential versus helical scanning technique, respectively. Table 2 displays the quantitative image quality data including image noise, signalto-noise ratio, and contrast-to-noise ratio derived on scanning mode. With sequential scanning, image noise and signal intensity significantly increased by 9% and 6%, respectively. Consequently, the derived signaland contrast-to-noise ratios did not differ significantly between both groups. Despite the reduction in radiation dose, there was no significant difference between groups regarding the image quality score (median score [IQR] for sequential vs helical mode, 3.50 [ ] vs 3.50 [ ], respectively; p = 0.622). Figure 1 displays the 68% reduction of radiation dose and comparable image quality in both groups. Whereas the image quality achieved using sequential coronary CTA was rated diagnostic in 93% Median Value (Interquartile Range) Helical Mode Mode Image noise (HU) 20 (17 24) 22 (19 27) Signal intensity (HU) 365 ( ) 388 ( ) Signal-to-noise ratio 17.7 ( ) 18.2 ( ) Contrast-to-noise ratio 13.0 ( ) 13.3 ( ) Dose Length Product (mgy cm) 2,000 1,000 0 Helical p < A Image Quality Score (Grade) Helical p < of the patients, only 89% of the patients examined with conventional helical CT had diagnostic examinations (p = 0.245) Figure 2 displays the image quality of two coronary CTA examinations acquired with either the sequential or helical scanning mode. Discussion In recent years, coronary CTA has evolved as a useful noninvasive imaging technique with a very high diagnostic accuracy for the detection of obstructive coronary artery disease [9 11]. In addition, coronary CTA has been shown to have a prognostic impact in the evaluation of patients with chest pain symptoms [12, 13]. However, the exposure to ionizing radiation associated with coronary CTA has raised concerns. Consequently, several radiation dose saving techniques have been developed for coronary CTA to obtain diagnostic coronary CTA images with the lowest possible radiation dose. The international PROTECTION I Study, which is a prospective multicenter survey study that focuses on radiation dose of coronary CTA p Fig. 1 Box-and-whisker plots. A and B, Box-and-whisker plots show dose length product (A) and image quality score (B) for coronary CT angiography examinations using either helical or sequential scanning mode. Horizontal line in each box shows median and top and bottom lines of boxes show interquartile range (IQR). Whiskers show lowest value still within 1.5 IQR of lower or upper quartile. B AJR:194, June
4 Bischoff et al. Fig year-old man who underwent coronary CT angiography for visualization of coronary arrteries (A C) and 67-year-old man who underwent coronary CT angiography for visualization of coronary arteries (D F). A F, Curved-planar maximum-intensity-projection CT angiograms of left descending artery (A and D), left circumflex artery (B and E), and right coronary artery (C and F) obtained using sequential scanning mode (A C) and helical scanning mode (D F) are shown for comparison with regard to image quality. in daily practice, revealed a median radiation dose of 12 msv (IQR, 8 18 msv) for coronary CTA [4]. Furthermore, in this study several independent predictors for the extent of coronary CTA radiation exposure have been identified. Among these factors, the prospective ECG-triggered sequential scanning protocol was a very strong independent predictor of a reduced exposure to ionizing radiation. However, the impact of the reduced dose on image quality and the level of diagnostic confidence are unknown. Therefore, the current study investigates the impact of a sequential image acquisition in coronary CTA on image quality and radiation dose in more detail in a prespecified subgroup analysis of the PROTECTION I Study. The current analysis shows a 68% reduction in coronary CTA radiation dose for the prospective ECG-triggered sequential scanning technique in patients with a low and stable heart rate when compared with the standard helical scanning technique. Taking the significantly longer scanning length in patients undergoing sequential scanning (139 and 129 mm for sequential and helical scanning mode, respectively) into account, the effect of applying the prospective ECG-triggered sequential scanning mode on radiation dose would be even higher. The differences in scanning length between the helical and sequential scanning mode may be explained by differences in scan range definition. Whereas scan range can be defined accurately to a millimeter in conventional helical CT, it must be a multiple of scan coverage less the overlapping zones in sequential scans. Therefore, in some cases the scan range must be larger in sequential scans than one would have defined it in conventional helical CT. Despite this tremendous reduction in radiation dose, image quality was comparable in both groups. Accordingly, the image quality score did not differ significantly between both scanning modes. In this analysis, the prospective ECG-triggered sequential scanning technique even showed a trend to a higher rate of diagnostic coronary CTA examinations than the conventional helical coronary CTA technique (93% vs 89%, respectively; p = 0.245). However, this analysis due to the study design provides no data about how many repeated scans were obtained when image quality was nondiagnostic. The relatively high rate of nondiagnostic image quality may be explained by the unselected study collective of the PROTECTION I Study and the strict image quality rating in the central core laboratory. In concordance with the results of the current analysis, Hein et al. [14] recently reported a 63% reduction of radiation dose for sequential image acquisition in comparison with standard helical image acquisition in patients examined using a dual-source CT system. Similar to our analysis, image quality did not differ significantly between both study groups. A radiation dose reduction of even 77% without deterioration of image quality was reported by Shuman et al. [7] who retrospectively analyzed coronary CTA studies of 100 matched patients either scanned with helical (n = 50) or sequential (n = 50) mode. Hirai et al. [6] performed both helical and sequential image acquisitions in 60 patients with a heart rate below 75 bpm. When compared with the helical scanning mode, the prospective ECG-triggered image acquisition led to a 79% reduction of calculated effective dose while maintaining image quality and the ability to assess for luminal stenosis. Despite its enormous potential for radiation dose reduction and high image quality, the prospective ECG-triggered sequential scanning mode has limitations. Using the sequential scanning mode, image acquisition usually is performed during a short predefined period during mid-to-late diastole, allowing only a small reconstruction window. In patients with higher heart rates and thus increased coronary artery motion, coronary CTA acquired during diastole often suffers from motion artifacts. Therefore, the prospective ECG-triggered sequential scanning mode is recommended for only patients with lower heart rates. In contrast, standard helical CT with ECG-dependent tube current modulation and with a wide time window of the full tube current also allows image reconstruction in late systole, where coronary artery motion in patients with high heart rates is least and thus less motion artifacts occur [15, 16]. In patients with lower heart rates, prospective ECG-triggered sequential scanning technique should be used more often. In the PRO- TECTION I Study, only 5% of all patients were examined using the sequential scanning technique. Applying a threshold of 63 bpm as suggested by Husmann et al. [17] below which sequential image acquisition can be performed with good image quality, 56% of the PROTECTION I Study population would have qualified for the sequential scanning 1498 AJR:194, June 2010
5 Versus Helical Mode for Coronary CTA technique. This points out the enormous potential of this dose-saving algorithm. There are two main reasons for the low rate of sequential scanning in the PROTECTION I Study: First, many CT systems used in the study did not allow sequential scanning during the study period. Second, many examiners may not have been familiar with the sequential scan algorithm and may have feared a potential loss of diagnostic image information. The sequential scanning technique can be combined with other dose-saving strategies. For example, an approach could be the combination of prospective ECG-triggered sequential image acquisition and a reduced tube voltage of 100 kv in nonobese patients with a slow and stable sinus rhythm. By combining these radiation dose reduction techniques, an estimated radiation dose of even below 2 msv can be obtained [18]. Limitations The PROTECTION I Study was an observational study and therefore the scanning protocol including the selection of the scanning mode was at the discretion of the performing physician. This nonrandomized study design creates a potential selection bias. The radiation dose associated with coronary calcium scoring, which is performed in some institutions before coronary CTA, was not obtained in the current study. Therefore, in this analysis only radiation dose associated with coronary CTA was taken into account. In the PROTECTION I Study, only patients with low heart rates were examined using the sequential scanning mode. Therefore, the diagnostic performance of ECGtriggered sequential image acquisition could not be evaluated in patients with higher heart rates. The mean heart rate in the group who underwent helical coronary CTA was significantly higher than that of patients examined with the sequential scanning technique. This difference in heart rate may have caused an image quality bias in favor of the sequential coronary CTA group. Besides heart rate, heart rate variability significantly influences image quality of the sequential scanning mode. Unfortunately, heart rate variability was not recorded in the PROTECTION I Study, so the effect of heart rate variability on image quality could not be assessed in the current analysis. Furthermore, invasive angiography results were not obtained routinely in all patients; for this reason, the diagnostic accuracy of the sequential scanning mode could not be investigated. Summary The results of this study show that, compared with the standard helical image acquisition, the prospective ECG-triggered sequential coronary CTA scanning technique significantly reduces radiation dose without impairing image quality in appropriately selected patients. References 1. Budoff MJ, Achenbach S, Blumenthal RS, et al. Assessment of coronary artery disease by cardiac computed tomography: a scientific statement from the American Heart Association Committee on Cardiovascular Imaging and Intervention, Council on Cardiovascular Radiology and Intervention, and Committee on Cardiac Imaging, Council on Clinical Cardiology. Circulation 2006; 114: Fox K, Garcia MA, Ardissino D, et al.; The Task Force on the Management of Stable Angina Pectoris of the European Society of Cardiology. Guidelines on the management of stable angina pectoris: executive summary the Task Force on the Management of Stable Angina Pectoris of the European Society of Cardiology. Eur Heart J 2006; 27: Hendel RC, Patel MR, Kramer CM, et al.; American College of Cardiology Foundation Quality Strategic Directions Committee Appropriateness Criteria Working Group; American College of Radiology; Society of Cardiovascular Computed Tomography; Society for Cardiovascular Magnetic Resonance; American Society of Nuclear Cardiology; North American Society for Cardiac Imaging; Society for Cardiovascular Angiography and Interventions; Society of Interventional Radiology. ACCF/ACR/SCCT/SCMR/ASNC/ NASCI/SCAI/SIR 2006 appropriateness criteria for cardiac computed tomography and cardiac magnetic resonance imaging: a report of the American College of Cardiology Foundation Quality Strategic Directions Committee Appropriateness Criteria Working Group, American College of Radiology, Society of Cardiovascular Computed Tomography, Society for Cardiovascular Magnetic Resonance, American Society of Nuclear Cardiology, North American Society for Cardiac Imaging, Society for Cardiovascular Angiography and Interventions, and Society of Interventional Radiology. J Am Coll Cardiol 2006; 48: Hausleiter J, Meyer T, Hermann F, et al. Estimated radiation dose associated with cardiac CT angiography. JAMA 2009; 301: Hsieh J, Londt J, Vass M, Li J, Tang X, Okerlund D. Step-and-shoot data acquisition and reconstruction for cardiac x-ray computed tomography. Med Phys 2006; 33: Hirai N, Horiguchi J, Fujioka C, et al. Prospective versus retrospective ECG-gated 64-detector coronary CT angiography: assessment of image quality, stenosis, and radiation dose. Radiology 2008; 248: Shuman WP, Branch KR, May JM, et al. Prospective versus retrospective ECG gating for 64-detector CT of the coronary arteries: comparison of image quality and patient radiation dose. Radiology 2008; 248: Menzel H, Schibilla H, Teunen D. European guidelines for quality criteria for computed tomography. European Commission, 2000: publication no. EUR EN 9. Dewey M, Rutsch W, Schnapauff D, Teige F, Hamm B. Coronary artery stenosis quantification using multislice computed tomography. Invest Radiol 2007; 42: Leber AW, Knez A, von Ziegler F, et al. Quantification of obstructive and nonobstructive coronary lesions by 64-slice computed tomography: a comparative study with quantitative coronary angiography and intravascular ultrasound. J Am Coll Cardiol 2005; 46: Raff GL, Gallagher MJ, O Neill WW, Goldstein JA. Diagnostic accuracy of noninvasive coronary angiography using 64-slice spiral computed tomography. J Am Coll Cardiol 2005; 46: Hadamitzky M, Freißmuth B, Meyer T, et al. Prognostic value of coronary computed tomographic angiography for prediction of cardiac events in patients with suspected coronary artery disease. JACC Cardiovasc Imaging 2009; 2: Min JK, Shaw LJ, Devereux RB, et al. Prognostic value of multidetector coronary computed tomographic angiography for prediction of all-cause mortality. J Am Coll Cardiol 2007; 50: Hein F, Meyer, T, Hadamitzky M, et al. Prospective ECG-triggered sequential scan protocol for coronary dual-source CT angiography: initial experience. Int J Cardiovasc Imaging (in press) 15. Herzog C, Arning-Erb M, Zangos S, et al. Multidetector row CT coronary angiography: influence of reconstruction technique and heart rate on image quality. Radiology 2006; 238: Seifarth H, Wienbeck S, Püsken M, et al. Optimal systolic and diastolic reconstruction windows for coronary CT angiography using dual-source CT. AJR 2007; 189: Husmann L, Valenta I, Gaemperli O, et al. Feasibility of low-dose coronary CT angiography: first experience with prospective ECG-gating. Eur Heart J 2008; 29: Scheffel H, Alkadhi H, Leschka S, et al. Lowdose CT coronary angiography in the step-andshoot mode: diagnostic performance. Heart 2008; 94: AJR:194, June
Improved Noninvasive Assessment of Coronary Artery Bypass Grafts With 64-Slice Computed Tomographic Angiography in an Unselected Patient Population
Journal of the American College of Cardiology Vol. 49, No. 9, 2007 2007 by the American College of Cardiology Foundation ISSN 0735-1097/07/$32.00 Published by Elsevier Inc. doi:10.1016/j.jacc.2006.10.066
More informationRadiation Dose Reduction and Coronary Assessability of Prospective Electrocardiogram-Gated Computed Tomography Coronary Angiography
Journal of the American College of Cardiology Vol. 52, No. 18, 2008 2008 by the American College of Cardiology Foundation ISSN 0735-1097/08/$34.00 Published by Elsevier Inc. doi:10.1016/j.jacc.2008.07.048
More informationLow-Dose Computed Tomography Coronary Angiography With Prospective Electrocardiogram Triggering
Journal of the American College of Cardiology Vol. 57, No. 3, 2011 2011 by the American College of Cardiology Foundation ISSN 0735-1097/$36.00 Published by Elsevier Inc. doi:10.1016/j.jacc.2010.08.634
More informationImage quality and, hence, the diagnostic value of cardiac. Imaging
Imaging Radiation Dose Estimates From Cardiac Multislice Computed Tomography in Daily Practice Impact of Different Scanning Protocols on Effective Dose Estimates Jörg Hausleiter, MD; Tanja Meyer, MD; Martin
More informationRadiation dose of cardiac CT what is the evidence?
Eur Radiol (2009) 19: 1311 1315 DOI 10.1007/s00330-009-1312-y CARDIAC Hatem Alkadhi Radiation dose of cardiac CT what is the evidence? Received: 10 December 2008 Revised: 2 January 2009 Accepted: 12 January
More informationLow-dose CT coronary angiography in the step-andshoot mode: diagnostic performance
1 Institute of Diagnostic Radiology, University Hospital Zurich, Zurich, Switzerland; 2 Clinic for Cardiovascular Surgery, University Hospital Zurich, Zurich, Switzerland; 3 Cardiovascular Centre, University
More informationEXPERIMENTAL AND THERAPEUTIC MEDICINE 9: , 2015
2384 Dose study of electrocardiogram automatic tube current modulation technology in prospective coronary computed tomography angiography scans of overweight patients GUIRU HE, XIAOPEI LIU, YAN LIU, WEI
More informationComparison of 64 slice multi detector CT vs 128 slice multi detector CT for acute chest pain evaluation in the chest pain unit
Comparison of 64 slice multi detector CT vs 128 slice multi detector CT for acute chest pain evaluation in the chest pain unit Poster No.: C-0642 Congress: ECR 2010 Type: Topic: Authors: Keywords: Keywords:
More informationA new method for radiation dose reduction at cardiac CT with multi-phase data-averaging and non-rigid image registration: preliminary clinical trial
A new method for radiation dose reduction at cardiac CT with multi-phase data-averaging and non-rigid image registration: preliminary clinical trial Poster No.: C-0595 Congress: ECR 2013 Type: Authors:
More informationCoronary CT angiography with prospective ECG-triggering: an effective alternative to invasive coronary angiography
Review Article Coronary CT angiography with prospective ECG-triggering: an effective alternative to invasive coronary angiography Zhonghua Sun Discipline of Medical Imaging, Department of Imaging and Applied
More informationComputed Tomography of the Coronary Arteries
Cardiology Update DAVOS 2011 Computed Tomography of the Coronary Arteries Anders Persson M.D., Ph.D Director, Assoc. Professor Center for Medical Image Science and Visualization Linköping University SWEDEN
More informationThe Final 10-Year Follow-up Results from the Bari Randomized Trial J Am Coll Cardiol (2007) 49;1600-6
The Final 10-Year Follow-up Results from the Bari Randomized Trial J Am Coll Cardiol (2007) 49;1600-6 n&list_uids=17433949 64-Multislice Detector Computed Tomography Coronary Angiography as Potential Alternative
More information128-slice dual-source CT coronary angiography using highpitch scan protocols in 102 patients
128-slice dual-source CT coronary angiography using highpitch scan protocols in 102 patients Poster No.: C-0634 Congress: ECR 2010 Type: Scientific Exhibit Topic: Cardiac Authors: Y. H. Choe, J. W. Lee,
More informationRoutine low-radiation-dose coronary computed tomography angiography
European Heart Journal Supplements (2014) 16 (Supplement B), B12 B16 The Heart of the Matter doi:10.1093/eurheartj/suu024 Routine low-radiation-dose coronary computed tomography angiography Mouaz H. Al-Mallah
More informationLow Dose Era in Cardiac CT
Low Dose Era in Cardiac CT DIANA E. LITMANOVICH, MD Department of Radiology Beth Israel Deaconess Medical Center Harvard Medical School Disclosures Neither I nor my immediate family members have a financial
More informationImprovement of Image Quality with ß-Blocker Premedication on ECG-Gated 16-MDCT Coronary Angiography
16-MDCT Coronary Angiography Shim et al. 16-MDCT Coronary Angiography Sung Shine Shim 1 Yookyung Kim Soo Mee Lim Received December 1, 2003; accepted after revision June 1, 2004. 1 All authors: Department
More informationTriple Rule-out using 320-row-detector volume MDCT: A comparison of the wide volume and helical modes
Triple Rule-out using 320-row-detector volume MDCT: A comparison of the wide volume and helical modes Poster No.: C-0488 Congress: ECR 2012 Type: Authors: Keywords: DOI: Scientific Exhibit E.-J. Kang,
More informationPushing the limits of cardiac CT. Steven Dymarkowski Radiology / Medical Imaging Research Centre
Pushing the limits of cardiac CT Steven Dymarkowski Radiology / Medical Imaging Research Centre 5 X 2013 Introduction Rapid technological advances and new clinical applications in cardiovascular imaging
More informationM Marwan, D Ropers, T Pflederer, W G Daniel, S Achenbach
Department of Cardiology, University of Erlangen, Erlangen, Germany Correspondence to: Dr M Marwan, Innere Medizin II, Ulmenweg 18, 91054 Erlangen, Germany; mohamed.marwan@ uk-erlangen.de Accepted 17 November
More informationImpact of SSF on diagnostic performance of coronary CT angiography within one heart beat in patients with high heart rate using a 256-row detector CT
Impact of SSF on diagnostic performance of coronary CT angiography within one heart beat in patients with high heart rate using a 256-row detector CT Junfu Liang 1,2, Hui Wang 1, Lei Xu 1, Li Dong 1, Zhanming
More informationRAMA-EGAT Risk Score for Predicting Coronary Artery Disease Evaluated by 64- Slice CT Angiography
RAMA-EGAT Risk Score for Predicting Coronary Artery Disease Evaluated by 64- Slice CT Angiography Supalerk Pattanaprichakul, MD 1, Sutipong Jongjirasiri, MD 2, Sukit Yamwong, MD 1, Jiraporn Laothammatas,
More informationFundamentals, Techniques, Pitfalls, and Limitations of MDCT Interpretation and Measurement
Fundamentals, Techniques, Pitfalls, and Limitations of MDCT Interpretation and Measurement 3 rd Annual Imaging & Physiology Summit November 20-21, 21, 2009 Seoul, Korea Wm. Guy Weigold, MD, FACC Cardiovascular
More informationEffect of dose reduction on image quality and diagnostic performance in coronary computed tomography angiography
Int J Cardiovasc Imaging (2013) 29:453 461 DOI 10.1007/s10554-012-0096-3 ORIGINAL PAPER Effect of dose reduction on image quality and diagnostic performance in coronary computed tomography angiography
More informationTechnology Assessment Institute: Summit on CT Dose Cardiac CT - Optimal Use of Evolving Scanner Technologies
Cardiac CT - Optimal Use of Evolving Scanner Technologies P. Rogalla, M.D. Dept. of Medical Imaging University of Toronto Special thanks to Dr. Lembcke, Dr. Hein Charité, Berlin Disclosures No salaries
More informationUltrasound. Computed tomography. Case studies. Utility of IQon Spectral CT in. cardiac imaging
Ultrasound Computed tomography Case studies Utility of IQon Spectral CT in cardiac imaging Cardiac imaging is a challenging procedure where it is necessary to image a motion-free heart. This requires a
More informationChapter 4. Department of Cardiology, Leiden University Medical Center, Leiden, The Netherlands. Department of Radiology,
Chapter 4 Impact of Coronary Calcium Score on Diagnostic Accuracy of Multislice Computed Tomography Coronary Angiography for Detection of Coronary Artery Disease Gabija Pundziute, 1,3 Joanne D. Schuijf,
More informationPurpose. Methods and Materials
Comparison of iterative and filtered back-projection image reconstruction techniques: evaluation of heavily calcified vessels with coronary CT angiography Poster No.: C-1644 Congress: ECR 2011 Type: Scientific
More informationDiagnostic value of 320-slice coronary CT angiography in coronary artery disease: A
Diagnostic value of 320-slice coronary CT angiography in coronary artery disease: A systematic review and meta-analysis Zhonghua Sun PhD 1, Chenghsun Lin PhD 2 1. Discipline of Medical Imaging, Department
More informationImpact of 64-Slice Multidetector Computed Tomography on Other Diagnostic Studies for Coronary Artery Disease
CLINICAL RESEARCH STUDY Impact of 64-Slice Multidetector Computed Tomography on Other Diagnostic Studies for Coronary Artery Disease Alex J. Auseon, DO, Sunil S. Advani, MD, Charles A. Bush, MD, Subha
More informationZurich Open Repository and Archive University of Zurich Main Library Strickhofstrasse 39 CH-8057 Zurich
Zurich Open Repository and Archive University of Zurich Main Library Strickhofstrasse CH-0 Zurich www.zora.uzh.ch Year: 01 Image quality and radiation dose comparison of prospectively triggered low-dose
More informationCorrelation of Cardiac CTA to Conventional Cardiac Angiography in Diagnosing Coronary Artery Stenosis in a Community Based Center
Correlation of Cardiac CTA to Conventional Cardiac Angiography in Diagnosing Coronary Artery Stenosis in a Community Based Center Mathieu Sabbagh, R3 Michigan State University Radiology Garden City Hospital
More informationCT Imaging of Atherosclerotic Plaque. William Stanford MD Professor-Emeritus Radiology University of Iowa College of Medicine Iowa City, IA
CT Imaging of Atherosclerotic Plaque William Stanford MD Professor-Emeritus Radiology University of Iowa College of Medicine Iowa City, IA PREVALENCE OF CARDIOVASCULAR DISEASE In 2006 there were 80 million
More informationOptimal image reconstruction intervals for non-invasive coronary angiography with 64-slice CT
Eur Radiol (2006) 16: 1964 1972 DOI 10.1007/s00330-006-0262-x CARDIAC Sebastian Leschka Lars Husmann Lotus M. Desbiolles Oliver Gaemperli Tiziano Schepis Pascal Koepfli Thomas Boehm Borut Marincek Philipp
More informationSince the introduction of multidetector. Original Research
Original Research Hellenic J Cardiol 2014; 55: 184-190 Radiation Dose and Image Noise Evaluation in Coronary Computed Tomography Angiography (CCTA) Using an Iterative Reconstruction Algorithm Sofia D.
More informationCoronary Artery Imaging. Suvipaporn Siripornpitak, MD Inter-hospital Conference : Rajavithi Hospital
Coronary Artery Imaging Suvipaporn Siripornpitak, MD Inter-hospital Conference : Rajavithi Hospital Larger array : cover scan area Detector size : spatial resolution Rotation speed : scan time Retrospective
More informationSimon Nepveu 1, Irina Boldeanu 1, Yves Provost 1, Jean Chalaoui 1, Louis-Mathieu Stevens 2,3, Nicolas Noiseux 2,3, Carl Chartrand-Lefebvre 1,3
Coronary Artery Bypass Graft Imaging with CT Angiography and Iterative Reconstruction: Quantitave Evaluation of Radiation Dose Reduction and Image Quality Simon Nepveu 1, Irina Boldeanu 1, Yves Provost
More informationMultislice CT angiography in cardiac imaging. Part III: radiation risk and dose reduction
R e v i e w A r t i c l e Singapore Med J 2010; 51(5) : 374 Multislice CT angiography in cardiac imaging. Part III: radiation risk and dose reduction Sun Z, Ng K H Discipline of Medical Imaging, Department
More informationSoft and Intermediate Plaques in Coronary Arteries: How Accurately Can We Measure CT Attenuation Using 64-MDCT?
64-MDCT Measurement of Coronary Artery Plaques Cardiac Imaging Original Research Jun Horiguchi 1 Chikako Fujioka 1 Masao Kiguchi 1 Yun Shen 2 Christian E. Althoff 3,4 Hideya Yamamoto 5 Katsuhide Ito 3
More informationResearch Article. Open Access. Jin-Da WANG, Hua-Wei ZHANG, Qian XIN, Jun-Jie YANG, Zhi-Jun SUN, Hong-Bin LIU, Lian CHEN, Luo-Shan DU, Yun-Dai CHEN
Journal of Geriatric Cardiology (2014) 11: 39 43 2014 JGC All rights reserved; www.jgc301.com Research Article Open Access Safety and efficacy of intravenous esmolol before prospective electrocardiogram-triggered
More informationAcademy of Medical Sciences, Guangdong General Hospital, Guangzhou, P.R. China. of multidetector computed tomography
Original Research Hellenic J Cardiol 2014; 55: 393-401 Potentially Optimal Body Size to Adjust Tube Current for Individualized Radiation Dose Control in Retrospective ECG-Triggered 256-Slice CT Coronary
More informationIs computed tomography angiography really useful in. of coronary artery disease?
Is computed tomography angiography really useful in screening patients with high risk of coronary artery disease? Myeong-Ki Hong, M.D. Ph D Professor of Medicine Division of Cardiology, Severance Cardiovascular
More informationComputed tomography in coronary imaging: current status
7 Computed tomography in coronary imaging: current status ARJUN NAIR AND ANAND DEVARAJ Recent technological advances have led to improvements in the use of computerised tomography for coronary imaging.
More informationDiagnostic value of coronary CT angiography with prospective ECG-gating in the
Diagnostic value of coronary CT angiography with prospective ECG-gating in the diagnosis of coronary artery disease: A systematic review and meta-analysis Zhonghua Sun PhD 1, Kwan-Hoong Ng PhD 2 1. Discipline
More informationContrast-Enhanced Computed Tomography Angiography (CTA) for Coronary Artery Evaluation
Contrast-Enhanced Computed Tomography Angiography (CTA) for Coronary Artery Evaluation Applies to all products administered or underwritten by Blue Cross and Blue Shield of Louisiana and its subsidiary,
More informationDiagnostic and Prognostic Value of Coronary Ca Score
Diagnostic and Prognostic Value of Coronary Ca Score Dr. Ghormallah Alzahrani Cardiac imaging division, Adult Cardiology department Prince Sultan Cardiac Center ( PSCC) Madina, June 2 Coronary Calcium
More informationMin Li 1, Bing-bing Yu 1, Jian-hua Wu 2, Lin Xu 3, Gang Sun 1 * Abstract. Introduction
Coronary CT Angiography Incorporating Doppler-Guided Prospective ECG Gating in Patients with High Heart Rate: Comparison with Results of Traditional Prospective ECG Gating Min Li 1, Bing-bing Yu 1, Jian-hua
More informationEur Heart J. 2011;32:637-45
Diagnostic Performance of Non-Invasive Multidetector Computed Tomography Coronary Angiography to Detect Coronary Artery Disease using Different Endpoints: Detection of Significant Stenosis versus Detection
More information2 Cardiovascular Computed Tomography: Current and Future Scanning System Design
2 Cardiovascular Computed Tomography: Current and Future Scanning System Design Wm. Guy Weigold Introduction The heart can be visualized in gross form on any standard chest computed tomography (CT), but
More informationCardiac CT - Coronary Calcium Basics Workshop II (Basic)
Cardiac CT - Coronary Calcium Basics Workshop II (Basic) J. Jeffrey Carr, MD, MSCE Dept. of Radiology & Public Health Sciences Wake Forest University School of Medicine Winston-Salem, NC USA No significant
More informationThe diagnostic evaluation of dual-source CT (DSCT) in the diagnosis of coronary artery stenoses
Original Article Open Access The diagnostic evaluation of dual-source CT (DSCT) in the diagnosis of coronary artery stenoses Ziqiao Lei 1, Jin Gu 2, Qing Fu 3, Heshui Shi 4, Haibo Xu 5, Ping Han 6, Jianming
More informationSYMPOSIA. Coronary CTA. Indications, Patient Selection, and Clinical Implications
SYMPOSIA Indications, Patient Selection, and Clinical Implications Christian Thilo, MD,* Mark Auler, MD,* Peter Zwerner, MD,w Philip Costello, MD,* and U. Joseph Schoepf, MD* Abstract: Recent technical
More informationThe radiation dose in retrospective
The radiation dose in retrospective gated tdcoronary computed td tomography (CCT) Saeed AL Ahmari, Ghormallah AL Zahrani, Sumiah AL Helali, Samir AL Dulikan, Abdullah Bafagih, HibaKhashojji Prince Sultan
More informationGeneral Cardiovascular Magnetic Resonance Imaging
2 General Cardiovascular Magnetic Resonance Imaging 19 Peter G. Danias, Cardiovascular MRI: 150 Multiple-Choice Questions and Answers Humana Press 2008 20 Cardiovascular MRI: 150 Multiple-Choice Questions
More informationEXPERIMENTAL AND THERAPEUTIC MEDICINE 5: , 2013
636 Adaptive prospective ECG-triggered sequence coronary angiography in dual-source CT without heart rate control: Image quality and diagnostic performance CHANG-JIE PAN, NONG QIAN, TAO WANG, XIAO-QIANG
More informationRecent Advancement of Cardiac CT
Recent Advancement of Cardiac CT Mario J Garcia, MD, FACC, FACP Director, Non-Invasive Cardiology Professor of Medicine and Radiology Mount Sinai School of Medicine * Disclosure: grant support from Philips
More informationPerspectives of new imaging techniques for patients with known or suspected coronary artery disease
Perspectives of new imaging techniques for patients with known or suspected coronary artery disease Department of Cardiology, Leiden University Medical Center, Leiden, The Netherlands Correspondence: Jeroen
More informationDiagnostic Accuracy of Noninvasive Coronary Angiography Using 64-Slice Spiral Computed Tomography
Journal of the American College of Cardiology Vol. 46, No. 3, 2005 2005 by the American College of Cardiology Foundation ISSN 0735-1097/05/$30.00 Published by Elsevier Inc. doi:10.1016/j.jacc.2005.05.056
More informationOriginal Article Application of flash dual-source CT at low radiation dose and low contrast medium dose in triple-rule-out (tro) examination
Int J Clin Exp Med 2015;8(11):21898-21905 www.ijcem.com /ISSN:1940-5901/IJCEM0015005 Original Article Application of flash dual-source CT at low radiation dose and low contrast medium dose in triple-rule-out
More informationStudies with electron beam computed tomography (EBCT) Imaging
Imaging Predictive Value of 16-Slice Multidetector Spiral Computed Tomography to Detect Significant Obstructive Coronary Artery Disease in Patients at High Risk for Coronary Artery Disease Patient- Versus
More informationDiagnostic accuracy of dual-source computed tomography in the detection of coronary chronic total occlusion: Comparison with invasive angiography
African Journal of Biotechnology Vol. 10(19), pp. 3854-3858, 9 May, 2011 Available online at http://www.academicjournals.org/ajb DOI: 10.5897/AJB10.983 ISSN 1684 5315 2011 Academic Journals Full Length
More informationWhat every radiologist should know about cardiac CT: A case-based pictorial review
What every radiologist should know about cardiac CT: A case-based pictorial review Poster No.: C-0555 Congress: ECR 2010 Type: Educational Exhibit Topic: Cardiac Authors: C. M. Capuñay, P. Carrascosa,
More informationFeasibility of contrast agent volume reduction on 640-slice CT coronary angiography in patients with low heart rate
Feasibility of contrast agent volume reduction on 640-slice CT coronary angiography in patients with low heart rate Poster No.: B-0742 Congress: ECR 2013 Type: Authors: Keywords: DOI: Scientific Paper
More informationNoninvasive Evaluation With Multislice Computed Tomography in Suspected Acute Coronary Syndrome
Journal of the American College of Cardiology Vol. 52, No. 3, 2008 2008 by the American College of Cardiology Foundation ISSN 0735-1097/08/$34.00 Published by Elsevier Inc. doi:10.1016/j.jacc.2008.04.012
More informationIntroduction. Original Article
Original Article Superior CT coronary angiography image quality at lower radiation exposure with second generation 320-detector row CT in patients with elevated heart rate: a comparison with first generation
More informationRadiation Dose Optimization in Cardiac CT: A Technical Review. CHENG Wai Kwong. 17 May Contents
Radiation Dose Optimization in Cardiac CT: A Technical Review CHENG Wai Kwong 17 May 2014 Contents 1. Introduction and background 2. Cardiac CT synchronization techniques 3. 4. Conclusion 1 Introduction
More informationCARDIAC IMAGING FOR SUBCLINICAL CAD
CARDIAC IMAGING FOR SUBCLINICAL CAD WHY DON'T YOU ADOPT MORE SMART TECHNIQUE? Whal Lee, M.D. Seoul National University Hospital Department of Radiology We are talking about Coronary artery Calcium scoring,
More informationCardiac CT Lowering the Dose Dramatically
Cardiac CT Lowering the Dose Dramatically U. Joseph Schoepf, MD, FAHA, FSCBT MR, FSCCT Professor of Radiology, Medicine, and Pediatrics Director of Cardiovascular Imaging Disclosures Consultant for / research
More informationCardiac Imaging Tests
Cardiac Imaging Tests http://www.medpagetoday.com/upload/2010/11/15/23347.jpg Standard imaging tests include echocardiography, chest x-ray, CT, MRI, and various radionuclide techniques. Standard CT and
More informationValidation of CT Perfusion Imaging Against Invasive Angiography and FFR on a 320-MDCT Scanner
Validation of CT Perfusion Imaging Against Invasive Angiography and FFR on a 320-MDCT Scanner Zhen Qian, Gustavo Vasquez, Sarah Rinehart, Parag Joshi, Eric Krivitsky, Anna Kalynych, Dimitri Karmpaliotis,
More informationCardiac computed tomography: indications, applications, limitations, and training requirements
European Heart Journal (2008) 29, 531 556 doi:10.1093/eurheartj/ehm544 SPECIAL ARTICLE Cardiac computed tomography: indications, applications, limitations, and training requirements Report of a Writing
More informationNon-invasive intravenous coronary angiography using electron beam tomography and multislice computed tomography
633 CARDIOVASCULAR MEDICINE Non-invasive intravenous coronary angiography using electron beam tomography and multislice computed tomography A W Leber, A Knez, C Becker, A Becker, C White, C Thilo, M Reiser,
More informationAccuracy of Multislice Computed Tomography in the Preoperative Assessment of Coronary Disease in Patients With Aortic Valve Stenosis
Journal of the American College of Cardiology Vol. 47, No. 10, 2006 2006 by the American College of Cardiology Foundation ISSN 0735-1097/06/$32.00 Published by Elsevier Inc. doi:10.1016/j.jacc.2005.11.085
More informationCalcium scoring using 64-slice MDCT, dual source CT and EBT: a comparative phantom study
Int J Cardiovasc Imaging (2008) 24:547 556 DOI 10.1007/s10554-007-9282-0 ORIGINAL PAPER Calcium scoring using 64-slice MDCT, dual source CT and EBT: a comparative phantom study Jaap M. Groen Æ Marcel J.
More informationMultidetector CT Angiography for the Detection of Left Main Coronary Artery Disease. Rani K. Hasan, M.D. Intro to Clinical Research July 22 nd, 2011
Multidetector CT Angiography for the Detection of Left Main Coronary Artery Disease Rani K. Hasan, M.D. Intro to Clinical Research July 22 nd, 2011 Outline Background Hypothesis Study Population Methodology
More informationAFib is the most common cardiac arrhythmia and its prevalence and incidence increases with age (Fuster V. et al. Circulation 2006).
Feasibility, image quality and radiation dose of coronary CT angiography (CCTA) in patients with atrial fibrillation using a new generation 256 multi-detector CT (MDCT) Poster No.: C-2378 Congress: ECR
More informationCoronary CT Angiography
Coronary CT Angiography Byoung Wook Choi, M.D. Department of Diagnostic Radiology Yonsei University College of Medicine, Severance Hospital E mail : bchoi@yumc.yonsei.ac.kr Abstract With the advent of
More informationNon-invasive Coronary Angiography: the Role, Limitations and Future of 64-Slice Spiral Computed Tomography Coronary Angiography
HOSPITAL CHRONICLES 2009, 4(3): 105 109 Review Non-invasive Coronary Angiography: the Role, Limitations and Future of 64-Slice Spiral Computed Tomography Coronary Angiography Arkadios C. Roussakis, MD
More informationFellows on this rotation are expected to attend nuclear conferences and multimodality imaging conference.
Rotation: Imaging 1 Imaging 1 provides COCATS Level 1 experience for nuclear cardiology (including SPECT and PET) and cardiac CT. Fellows will administer, process, and read cardiac nuclear studies with
More informationMEDICAL UNIVERSITY of SOUTH CAROLINA
U. Joseph Schoepf, MD Prof. (h.c.), FAHA, FSCBT-MR, FNASCI, FSCCT Professor of Radiology, Medicine, and Pediatrics Director, Division of Cardiovascular Imaging MEDICAL UNIVERSITY of SOUTH CAROLINA Disclosures
More informationLow-dose prospective ECG-triggering dual-source CT angiography in infants and children with complex congenital heart disease: first experience
Low-dose prospective ECG-triggering dual-source CT angiography in infants and children with complex congenital heart disease: first experience Ximing Wang, M.D., Zhaoping Cheng, M.D., Dawei Wu, M.D., Lebin
More informationDiagnostic Value of 64-Slice Dual-Source CT Coronary Angiography in Patients with Atrial Fibrillation: Comparison with Invasive Coronary Angiography
Original Article DOI: 10.3348/kjr.2011.12.4.416 pissn 1229-6929 eissn 2005-8330 Korean J Radiol 2011;12(4):416-423 Diagnostic Value of 64-Slice Dual-Source CT Coronary Angiography in Patients with Atrial
More informationCardiac CT imaging in coronary artery disease: Current status and future directions
Research Highlight Cardiac CT imaging in coronary artery disease: Current status and future directions Zhonghua Sun Discipline of Medical Imaging, Department of Imaging and Applied Physics, Curtin University,
More informationNoninvasive Coronary Imaging: Plaque Imaging by MDCT
Coronary Physiology & Imaging Summit 2007 Noninvasive Coronary Imaging: Plaque Imaging by MDCT Byoung Wook Choi Department of Radiology Yonsei University, Seoul, Korea Stary, H. C. et al. Circulation
More informationCardiac Computed Tomography
Cardiac Computed Tomography Authored and approved by Koen Nieman Stephan Achenbach Francesca Pugliese Bernard Cosyns Patrizio Lancellotti Anastasia Kitsiou Contents CARDIAC COMPUTED TOMOGRAPHY Page 1.
More informationDose Reduction Options in Cardiac CT
Dose Reduction Options in Cardiac CT Doyle P, Ball P*, Donnelly P # Radiological Sciences & Imaging, Forster Green Hospital *Department of Radiology, Ulster Hospital # Department of Cardiology, Ulster
More informationAccuracy of dual-source CT coronary angiography: first experience in a high pre-test probability population without heart rate control
Eur Radiol (2006) 16: 2739 2747 DOI 10.1007/s00330-006-0474-0 CARDIAC Hans Scheffel Hatem Alkadhi André Plass Robert Vachenauer Lotus Desbiolles Oliver Gaemperli Tiziano Schepis Thomas Frauenfelder Thomas
More informationImpact of Body Mass Index and Metabolic Syndrome on the Characteristics of Coronary Plaques Using Computed Tomography Angiography
Impact of Body Mass Index and Metabolic Syndrome on the Characteristics of Coronary Plaques Using Computed Tomography Angiography Cardiovascular Division, Faculty of Medicine, University of Tsukuba Akira
More informationCoronary Calcium Screening Using Low-Dose Lung Cancer Screening: Effectiveness of MDCT with Retrospective Reconstruction
Cardiac Imaging Original Research Kim et al. Coronary Calcium Screening Using Lung Cancer Screening Cardiac Imaging Original Research Sung Mok Kim 1 Myung Jin Chung 1 Kyung Soo Lee 1 Yeon Hyun Choe 1 Chin
More informationΕξελίξεις και νέες προοπτικές στην καρδιαγγειακή απεικόνιση CT. Σταμάτης Κυρζόπουλος Ωνάσειο Καρδιοχειρουργικό Κέντρο
Εξελίξεις και νέες προοπτικές στην καρδιαγγειακή απεικόνιση CT Σταμάτης Κυρζόπουλος Ωνάσειο Καρδιοχειρουργικό Κέντρο No conflict of interest to disclose Noninvasive Cardiac Imaging Unresolved Issues-Future
More informationHospital, 6 Lukon Road, Lukong Town, Changhua Shien, Taiwan 505, Taiwan.
Volume 1, Issue 1 Image Article Resolution of Inferior Wall Ischemia after Successful Revascularization of LAD Lesion: The Value of Myocardial Perfusion Imaging in Guiding Management of Multi-vessel CAD
More informationCombined Anatomical and Functional Imaging with Revolution * CT
GE Healthcare Case studies Combined Anatomical and Functional Imaging with Revolution * CT Jean-Louis Sablayrolles, M.D. Centre Cardiologique du Nord, Saint-Denis, France Case 1 Whole Brain Perfusion and
More informationThe 2016 NASCI Keynote: Trends in Utilization of Cardiac Imaging: The Coronary CTA Conundrum. David C. Levin, M.D.
The 2016 NASCI Keynote: Trends in Utilization of Cardiac Imaging: The Coronary CTA Conundrum David C. Levin, M.D. October 16, 2016 MPI Utilization Rates/1000[includes PET] total radiologists 2014 total
More informationMEDICAL POLICY SUBJECT: CORONARY CALCIUM SCORING
MEDICAL POLICY PAGE: 1 OF: 5 If the member's subscriber contract excludes coverage for a specific service it is not covered under that contract. In such cases, medical policy criteria are not applied.
More informationA practical approach for a patient-tailored dose protocol in coronary CT angiography using prospective ECG triggering
DOI 10.1007/s10554-015-0802-z ORIGINAL PAPER A practical approach for a patient-tailored dose protocol in coronary CT angiography using prospective ECG triggering J. D. van Dijk 1,4 E. D. Huizing 1,4 P.
More informationAn Introduction to Dual Energy Computed Tomography
An Introduction to Dual Energy Computed Tomography Michael Riedel University of Texas Health Science Center at San Antonio Introduction The idea of computed tomography (CT) was first introduced in the
More informationMultidetector Computed Tomography (MDCT) in Coronary Surgery: First Experiences With a New Tool for Diagnosis of Coronary Artery Disease
Multidetector Computed Tomography (MDCT) in Coronary Surgery: First Experiences With a New Tool for Diagnosis of Coronary Artery Disease Hendrik Treede, MD, Christoph Becker, MD, Hermann Reichenspurner,
More informationCoronary Artery Disease - Reporting and Data System (CAD-RADS)
A joint publication of the Department of Radiology and Corrigan Minehan Heart Center November 2016 Issue 66 Coronary Artery Disease - Reporting and Data System (CAD-RADS) Sandeep S. Hedgire, MD; Udo Hoffmann,
More informationAdapted Transfer Function Design for Coronary Artery Evaluation
Adapted Transfer Function Design for Coronary Artery Evaluation Sylvia Glaßer 1, Steffen Oeltze 1, Anja Hennemuth 2, Skadi Wilhelmsen 3, Bernhard Preim 1 1 Department of Simulation and Graphics, University
More informationAngio-CT: heart and coronary arteries
European Journal of Radiology 45 (2003) S32/S36 www.elsevier.com/locate/ejrad Angio-CT: heart and coronary arteries Andreas F. Kopp * Tübingen University Hospital, Tübingen, Germany Received 22 November
More informationCoronary revascularization treatment based on dual-source computed tomography
Eur Radiol (2008) 18: 1800 1808 DOI 10.1007/s00330-008-0959-0 CARDIAC R. Dikkers T. P. Willems L. H. Piers G. J. de Jonge R. A. Tio H. J. van der Zaag-Loonen P. M. A. van Ooijen F. Zijlstra M. Oudkerk
More information