Dual-Energy CT Applications in Head and Neck Imaging
|
|
- Felix Sanders
- 6 years ago
- Views:
Transcription
1 ual-energy T Review Vogl et al. Head and Neck ual-energy T ual-energy T Review Thomas J. Vogl 1 oris Schulz 1 Ralf W. auer 1 Timo Stöver 2 Robert Sader 3 hmed M. Tawfik 1,4 Vogl TJ, Schulz, auer RW, Stöver T, Sader R, Tawfik M Keywords: dual-energy T, head and neck, low-kilovoltage T OI: /JR Received pril 19, 2012; accepted without revision May 4, Publication of this supplement to the merican Journal of Roentgenology is made possible by an unrestricted grant from Siemens Healthcare. 1 Institute for iagnostic and Interventional Radiology, Johann Wolfgang Goethe University Hospital, Theodor-Stern-Kai 7, Frankfurt am Main, Germany. ddress correspondence to T. J. Vogl (T.Vogl@em.uni-frankfurt.de). 2 epartment of Otolaryngology, Head and Neck Surgery, University Hospital of Frankfurt, Frankfurt am Main, Germany. 3 epartment of ental, Oral and Maxillofacial surgery, University Hospital of Frankfurt, Frankfurt am Main, Germany. 4 iagnostic and Interventional Radiology epartment, Mansoura Faculty of Medicine, Mansoura, Egypt. JR 2012; 199:S34 S X/12/1995 S34 merican Roentgen Ray Society ual-energy T pplications in Head and Neck Imaging OJETIVE. ual-energy scanning is a breakthrough in T technology that has several applications in chest and abdominal imaging. ual-energy T also has potential for head and neck imaging. This review describes the role of dual-energy T in head and neck imaging. ONLUSION. s with other body regions, both image fusion and material characterization dual-energy applications can be used for head and neck imaging. Early results are promising, and further research is encouraged. T echnologic advances in T in the last few years have exceeded all expectations. T not only is faster, has higher resolution, and has greater anatomic coverage than ever but also is capable of material characterization and other applications owing to dual-energy technique. ual-energy T (ET) refers to the new simultaneous acquisition of low- and highvoltage T data. dvances in hardware platforms, including dual-source T and other dual energy capable T scanners and dedicated dual-energy software are now commercially available and installed at many institutions worldwide. Several applications of ET are in clinical use, especially in chest and abdominal imaging [1 4], and applications for other body regions are being developed. The head and neck region is no exception, and this review focuses on the advantages and applications of ET in head and neck imaging. Technical onsiderations Several techniques have been developed for ET scanning (e.g., dual-source T from Siemens Healthcare and rapid peak kilovoltage switching from GE Healthcare). Technical details of dual-energy scanners and comparison of approaches to dual-energy scanning are beyond the scope of this article, and the reader is referred to other review articles [1, 2, 5]. ll images in this review were obtained with a 128-MT dual-source scanner (Somatom efinition Flash, Siemens Healthcare). dual-source T scanner is composed of two tube-detector systems mounted on the same gantry at 90 to each other. T acquisi- tion was performed at different peak kilovoltage settings for the two tubes (tube, 80 kvp; tube, 140 kvp with a tin filter). Other scanning parameters were as follows: collimation, 0.6 mm; rotation time, 0.5 second; pitch, 0.9. utomatic exposure control was used. Reference tube current time product values were 151 ms for the 140-kVp tube with a tin filter and 302 ms for the 80-kVp tube. Radiation ose onsiderations Patient radiation dose from ET is a major concern, and any new technique that harbors an undue increase in radiation dose will not be widely accepted. In a phantom study of two dual-source scanners, Schenzle et al. [6] reported that ET of the chest is comparable to standard T without additional radiation dose. Image quality is a function of radiation dose, and the tradeoff between improving image quality without increasing the radiation dose and between lowering the radiation dose without compromising image quality is of utmost importance, especially in the complex and challenging head and neck region. Tawfik et al. [7] compared the quantitative and qualitative image quality of ET with that of standard T at five anatomic levels in the head and neck. They reported that ET is comparable to standard T even when the radiation dose is 12% lower. Those authors concluded that ET of the head and neck yields multiple additional datasets with no radiation dose penalty. asic Principles T depends on the x-ray attenuation of different materials, which is quantified in HU S34 JR:199, November 2012
2 Head and Neck ual-energy T and displayed as shades of gray. t x-ray energies relevant to diagnostic imaging, the two predominant interactions between x-ray photons and matter are ompton scattering (x-ray scatter with fractional loss of x-ray energy) and photoelectric absorption (complete x-ray absorption) [8, 9]. In conventional T at kvp, ompton scattering predominates. In the lower energy range, however, ompton scattering remains constant and photoelectric absorption increases. X-ray attenuation is therefore typically higher for lower-energy than for higher-energy photons. The probability of photoelectric absorption also increases markedly when the imaged material has a high atomic number [1, 2, 8]. oncerning ET, two main conclusions can be drawn from the foregoing information. First, the attenuation of materials with a high atomic number (e.g., iodine) is higher with lower-energy than with higher-energy scanning. It follows that the attenuation of vessels, enhancing normal structures, and enhancing pathologic lesions is much higher on 80-kVp than on 120- or 140-kVp images [10]. The attenuation of soft tissue increases only a small amount, so enhancing pathologic lesions are more conspicuous when a low tube voltage is used [11] (Figs. 1 and 2). This is the basic principle for image fusion in ET. Second, when an object with unknown material composition is imaged twice with two different energy spectra (e.g., 80 and 140 kvp), materials within that object can be differentiated and quantified on the basis of the change in x-ray attenuation with E reference to the expected change in x-ray attenuations of (up to three) known materials. lgorithms for material characterization are commercially available in dual energy equipped workstations [1, 12]. Image Fusion in the Head and Neck With every dual-energy scan, both low- and high-tube-voltage image datasets are routinely reconstructed and can be separately evaluated. The low-voltage (e.g., 80 kvp) dataset is characterized by a marked increase in the attenuation of iodine (contrast enhancement) but at the expense of increase in image noise [13, 14]. espite the degraded image quality, the increased lesion enhancement and contrast-to-noise ratio in the 80-kVp image dataset is advantageous in some cases when lesion Fig year-old man with left retromolar carcinoma. E, xial T images show dual-energy image fusion with ascending weighting factors (percentage of low tube contribution in image) from 0.0 or 140 kvp (), to 0.3 (), 0.6 (), 0.8 (), and finally to 1.0 or 80 kvp (E). Lesion (arrow) and vascular enhancement increase gradually from through E. Image noise also increases. JR:199, November 2012 S35
3 Vogl et al. detection is difficult because of small size or difficult anatomy (Figs. 1 and 2). The highvoltage (e.g., 140 kvp with a tin filter) dataset will have low image noise but at the expense of a lower enhancement level, limiting its diagnostic value. Together with the low- and high-voltage datasets, a mixed image from the data of a dual-energy scan is routinely reconstructed. This is called the weighted-average image dataset and combines the characters of the lowand high-voltage acquisitions according to the applied weighting factor. t tube voltages of 80 kvp and of 140 kvp, the 0.3 weightedaverage dataset (30% from 80-kVp data and 70% from 140-kVp data) is the one usually used for routine diagnostic purposes because it simulates a standard 120-kVp acquisition [7, 15] (Figs. 1 and 2). In addition to the aforementioned image datasets (80 kvp, 140 kvp, and 0.3 weightedaverage), with the use of work stations equipped with dual-energy software, any other desired weighted-average mixture from the two acquisitions can be generated and result in significant differences in attenuation and image noise [16] (Fig. 1). To take advantage of the plentiful available weighted-average mixtures, it is possible to manually adjust the weighting factor of high- and low-energy acquisitions until the best image quality and contrast for an individual scan are reached. Graser et al. [17] reported that with manual adjustment of the weighting factors for ET of the abdomen, image quality can be improved for some patients when a 0.5 weighting factor is set rather than the usual 0.3 weighting factor. Unfortunately, manual adjustment is time-consuming and can only be done at a dedicated workstation. nother approach is that multiple image datasets at different weighting factors are reconstructed at the time of acquisition and sent to the PS. This process is also time-consuming, overloads the PS, and increases interpretation time. nother, perhaps more practical, approach is to reconstruct a predetermined single best weighting factor at the time of T acquisition. Tawfik et al. [18] compared multiple weighting factors in ET of the head and neck and observed significantly improved image quality using a weighting factor of 0.6 (60% from 80 kvp, 40% from 140 kvp with a tin filter). Those authors also reported increased contrast-to-noise ratios and subjective lesion delineation of squamous cell carcinoma of the upper aerodigestive tract. They recommended that a 0.6 weighted-average image dataset be reconstructed for ET of the head and neck in addition to the aforementioned routine datasets. The weighted-average image datasets are mixtures of the data acquired at low and high tube voltages that simulate standard single-energy acquisitions at the equivalent photon energies. This process is called linear image fusion. lternatively, a nonlinear algorithm for blending low- and high-voltage data has been described that differs from the linear blending method that entails use of the same mixing ratio across all the pixels. In nonlinear blending, a different mixing ratio is calculated at each pixel according to a specific formula with the attenuation value of the pixel as a variable [19, 20]. ccordingly, voxels with low attenuation in muscle and homogeneous organs are preferentially obtained from the high-voltage data to minimize noise, whereas voxels with Fig year-old man with right oropharyngeal carcinoma (arrow). xial T images comparing linear and nonlinear dual-energy image fusion., 140-kVp image., 80-kVp image., 0.3 weighted-average linear fusion image (30% from 80 kvp and 70% from 140 kvp)., Nonlinear fused image. Nonlinear image fusion provides high lesion and vascular contrast enhancement (weighted toward 80 kvp) and very low noise (weighted toward 140 kvp). S36 JR:199, November 2012
4 Head and Neck ual-energy T Fig year-old man with right peritonsillar abscess (star). xial T images show iodine characterization., 0.3 weighted-average image., Subtraction of iodine from contrast-enhanced dual-energy scan results in virtual unenhanced image., Iodine distribution map resulting from readdition of iodine. Fig year-old woman with left retromolar carcinoma (arrow, ). xial dual-energy T images., 0.3 weighted-average map., Nonlinear fused image., Iodine distribution map., Iodine distribution map with region of interest (1) inserted in lesion for quantification of net enhancement. Iodine overlay is 81 HU, and iodine content is 3 mg/ml. JR:199, November 2012 S37
5 Vogl et al. high attenuation are extracted from the lowkilovoltage data to maximize contrast enhancement. Therefore, theoretically, nonlinear blending can be used to maintain the better contrast of the low-voltage scan while the noise characteristics of the high-voltage scan are retained. y use of nonlinear fusion of low- and highvoltage data, T images with better contrast-tonoise values and improved image quality may be produced [19, 20] (Fig. 2). Material haracterization in the Head and Neck With material characterization algorithms, iodine can be differentiated from other tissues on a contrast-enhanced dual-energy scan. The dual-energy software then subtracts iodine from all regions of the image, generating a virtual unenhanced image (Fig. 3). On this virtual unenhanced image, enhancing lesions Fig year-old man with squamous cell carcinoma infiltrating right auricular soft tissue (arrow, ). xial dual-energy T images., 0.3 weighted-average image., Nonlinear fused image., Iodine distribution map., Iodine distribution map with region of interest (1) inserted in lesion. Iodine overlay is 43 HU, and iodine content is 2.5 mg/ml. can be differentiated from calcification and other high-attenuation lesions without having the patient undergo scanning before contrast administration [21]. Material-specific datasets are volumetric and therefore can be evaluated as reconstructed axial images or after processing with conventional 3 applications such as multiplanar reconstruction, maximum intensity projection, and volumerendered reformation [12]. nother application of dual-energy technique is the generation of iodine distribution images or maps on which the calculated iodine distribution on an image is color coded and superimposed on the virtual unenhanced images [22, 23]. For imaging of the head and neck, use of the color-coded map is thought to increase visual detection of lesions. ecause color is superimposed on original T images, excellent anatomic detail is preserved, and lesions can be easily delineated from their surroundings (Fig. 4). lthough the iodine distribution map is referred to as a perfusion map, especially in the lung, it is neither a first-pass nor a dynamic study and hence cannot be used for calculation of semiquantitative (peak enhancement) or quantitative perfusion parameters (e.g., blood flow, blood volume, transit time) [24]. n iodine distribution map, however, is indirectly linked to perfusion because it reflects both intravascular and extravascular iodine concentrations in tissues. The intravascular component depends on regional blood volume, and the extravascular component depends on the permeability of the capillaries to contrast medium [25]. Unfortunately, the two compartments cannot be separated with this method. part from perfusion parameters, which can be obtained only with dynamic (timeresolved) imaging [3], the iodine distribution map allows calculation of the net enhancement value of a lesion (i.e., the difference between unenhanced and enhanced images) by simple insertion of a region of interest (ROI). This quantitative net enhancement value is called the iodine overlay (measured in HU). nother, more or less similar, value also obtained is the iodine content (measured in milligrams per milliliter) (Figs. 4 and 5). This method eliminates the need for an unenhanced scan for subtraction, so the radiation dose is markedly reduced. Errors in insertion of ROIs between unenhanced and enhanced scans are avoided because in dual-energy scanning, both values are obtained by insertion of only one ROI [26, 27]. onclusion lthough the literature is still accumulating, early results of ET of the head and neck are promising. The main advantage of ET is that several additional datasets are obtained without a radiation dose penalty. Improved image quality, better lesion detection, and quantitative calculation of the degree of enhancement are immediate well-recognized benefits. Further research is required to make the most of such new technology. References 1. Yeh M, Shepherd J, Wang ZJ, et al. ual-energy and low-kvp T in the abdomen. JR 2009; 193: Kang MJ, Park M, Lee H, et al. ual-energy T: clinical applications in various pulmonary diseases. RadioGraphics 2010; 30: Thieme SF, Johnson TR, Reiser MF, Nikolaou K. S38 JR:199, November 2012
6 Head and Neck ual-energy T ual-energy lung perfusion computed tomography: principles and postprocessing techniques of dual- dual energy computed tomography for detection a novel pulmonary functional imaging method. Se- energy T: illustrated by selected congenital ab- of hypervascular liver hepatocellular carcinoma: min Ultrasound T MR 2010; 31: normalities of the thorax. J Thorac Imaging 2009; phantom and preliminary studies. Invest Radiol 4. Manglaviti G, Tresoldi S, Guerrer S, i Leo G, 24: ; 45: et al. In vivo evaluation of the chemical composi- 13. Schindera ST, Nelson R, Mukundan S Jr, et al. 20. Holmes R 3rd, Fletcher JG, pel, et al. Evalua- tion of urinary stones using dual-energy T. JR 2011; 197:146; [web]w76 W83 5. Vrtiska TJ, Takahashi N, Fletcher JG, Hartman RP, Yu L, Kawashima. Genitourinary applications of dual-energy T. JR 2010; 194: Schenzle J, Sommer WH, Neumaier K, et al. ual energy T of the chest: how about the dose? Invest Radiol 2010; 45: Tawfik M, Kerl JM, Razek, et al. Image quality and radiation dose of dual-energy T of the head and neck compared with a standard 120- kvp acquisition. JNR 2011; 32: Johnson TR, Krauss, Sedlmair M, et al. Material differentiation by dual energy T: initial experience. Eur Radiol 2007; 17: oursey, Nelson R, oll T. ual-energy multidetector T: how does it work, what can it tell us, and when can we use it in abdominopelvic imaging? RadioGraphics 2010; 30: Nakayama Y, wai K, Funama Y, et al. bdominal T with low tube voltage: preliminary observations about radiation dose, contrast enhancement, image quality, and noise. Radiology 2005; 237: Marin, Nelson R, Samei E, et al. Hypervascular liver tumors: low tube voltage, high tube current multidetector T during late hepatic arterial phase for detection initial clinical experience. Radiology 2009; 251: Godoy M, Naidich P, Marchiori E, et al. asic Hypervascular liver tumors: low tube voltage, high tube current multi-detector row T for enhanced detection phantom study. Radiology 2008; 246: Matsuoka S, Hunsaker R, Gill RR, et al. Vascular enhancement and image quality of MT pulmonary angiography in 400 cases: comparison of standard and low kilovoltage settings. JR 2009; 192: Macari M, Spieler, Kim, et al. ual-source dual-energy MT of pancreatic adenocarcinoma: initial observations with data generated at 80 kvp and at simulated weighted-average 120 kvp. JR 2010; 194:144; [web]w27 W ehrendt FF, Schmidt, Plumhans, et al. Image fusion in dual energy computed tomography: effect on contrast enhancement, signal-to-noise ratio and image quality in computed tomography angiography. Invest Radiol 2009; 44: Graser, Johnson TR, handarana H, Macari M. ual energy T: preliminary observations and potential clinical applications in the abdomen. Eur Radiol 2009; 19: Tawfik M, Kerl JM, auer RW, et al. ual-energy T of head and neck cancer: average weighting of low- and high-voltage acquisitions to improve lesion delineation and image quality initial clinical experience. Invest Radiol 2011; 47: Kim KS, Lee JM, Kim SH, et al. Image fusion in tion of non-linear blending in dual-energy computed tomography. Eur J Radiol 2008; 68: Graser, Johnson TR, Hecht EM, et al. ual-energy T in patients suspected of having renal masses: can virtual nonenhanced images replace true nonenhanced images? Radiology 2009; 252: Song K, Kim K, Park K, Kim. Utility of iodine overlay technique and virtual unenhanced images for the characterization of renal masses by dual-energy T. JR 2011; 197:1391; [web] W1076 W rown L, Hartman RP, zyubak OP, et al. ual energy T iodine overlay technique for characterization of renal masses as cyst or solid: a phantom feasibility study. Eur Radiol 2009; 19: Thieme SF, Johnson TR, Lee, et al. ual-energy T for the assessment of contrast material distribution in the pulmonary parenchyma. JR 2009; 193: Miles K. Tumour angiogenesis and its relation to contrast enhancement on computed tomography: a review. Eur J Radiol 1999; 30: hae EJ, Song JW, Krauss, et al. ual-energy computed tomography characterization of solitary pulmonary nodules. J Thorac Imaging 2010; 25: handarana H, Megibow J, ohen, et al. Iodine quantification with dual-energy T: phantom study and preliminary experience with renal masses. JR 2011; 196:1296; [web]w693 W700 JR:199, November 2012 S39
Dual-Energy CT: The Technological Approaches
Dual-Energy CT: The Technological Approaches Dushyant Sahani, M.D Director of CT Associate Professor of Radiology Massachusetts General Hospital Harvard Medical School Email-dsahani@partners.org Disclosure
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 informationDual Energy CT Aortography: Can We Reduce Iodine Dose??
Dual Energy CT Aortography: Can We Reduce Iodine Dose?? William P. Shuman MD, FACR FSCBTMR Department of Radiology University of Washington SCBTMR Annual Course Boston, October 10, 2012 Conflict of Interest
More informationInnovations in CT Dose Reduction Strategy: Application of the Adaptive Statistical Iterative Reconstruction Algorithm
Medical Physics and Informatics Pictorial Essay Silva et al. T Dose Reduction Medical Physics and Informatics Pictorial Essay Downloaded from www.ajronline.org by 46.3.203.191 on 12/18/17 from IP address
More informationDual-Energy CT Applications in the Abdomen
Dual-Energy CT Review Dual-Energy CT Review Tobias Heye 1 Rendon C. Nelson Lisa M. Ho Daniele Marin Daniel T. Boll Heye T, Nelson RC, Ho LM, Marin D, Boll DT Keywords: abdomen, dual-energy CT, iodine extraction,
More informationFused monochromatic imaging acquired by single source dual energy CT in hepatocellular carcinoma during arterial phase: an initial experience
Original Article Fused monochromatic imaging acquired by single source dual energy CT in hepatocellular carcinoma during arterial phase: an initial experience Shun-Yu Gao, Xiao-Peng Zhang, Yong Cui, Ying-Shi
More informationTrue Dual Energy. Dr. Stefan Ulzheimer, Siemens Healthcare GmbH. DEfinitely Siemens
DEfinitely Siemens True Dual Energy Dr. Stefan Ulzheimer, Siemens Healthcare GmbH International version. Not for distribution in the US. Unrestricted Siemens AG 2015 All rights reserved. The products/features
More information8/3/2016. Consultant for / research support from: Astellas Bayer Bracco GE Healthcare Guerbet Medrad Siemens Healthcare. Single Energy.
U. Joseph Schoepf, MD Prof. (h.c.), FAHA, FSCBT-MR, FNASCI, FSCCT Professor of Radiology, Medicine, and Pediatrics Director, Division of Cardiovascular Imaging Consultant for / research support from: Astellas
More informationComputed tomography. Department of Radiology, University Medical School, Szeged
Computed tomography Department of Radiology, University Medical School, Szeged voxel +1-4 +2 +5 +3 +1 0-2 pixel -2 0 +1-4 -6 +5 +2 +1 Department of Radiology, University Medical School, Szeged
More informationMetal Artifact Reduction by Dual Energy CT
Metal Artifact Reduction by Dual Energy CT Poster No.: C-0108 Congress: ECR 2011 Type: Authors: Keywords: DOI: Scientific Paper T. Johnson, F. Bamberg, A. Dierks, H.-C. Becker, M. F. Reiser; Munich/DE
More informationB-Flow, Power Doppler and Color Doppler Ultrasound in the Assessment of Carotid Stenosis: Comparison with 64-MD-CT Angiography
Med. J. Cairo Univ., Vol. 85, No. 2, March: 805-809, 2017 www.medicaljournalofcairouniversity.net B-Flow, Power Doppler and Color Doppler Ultrasound in the Assessment of Carotid Stenosis: Comparison with
More informationDual-Energy MDCT for Imaging the Renal Mass
Genitourinary Imaging linical Perspective Mileto et al. Dual-Energy MDT of Renal Masses Genitourinary Imaging linical Perspective FOUS ON: chille Mileto 1 Rendon. Nelson Erik K. Paulson Daniele Marin Mileto,
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 informationDual-Energy 101: Principles, Methods and Dose
Dual-Energy 101: Principles, Methods and Dose Juan Carlos Ramirez-Giraldo, Ph.D Staff Scien2st, Collabora2ons Manager SE Region ISCT San Francisco, 2017 Siemens Medical Solu2ons USA, Inc., 2017 Page 1
More informationA Snapshot on Nuclear Cardiac Imaging
Editorial A Snapshot on Nuclear Cardiac Imaging Khalil, M. Department of Physics, Faculty of Science, Helwan University. There is no doubt that nuclear medicine scanning devices are essential tool in the
More informationRole of Dual source CT angiography and perfusion in the diagnosis of pulmonary embolism
Role of Dual source CT angiography and perfusion in the diagnosis of pulmonary embolism Poster No.: C-1145 Congress: ECR 2011 Type: Educational Exhibit Authors: P. S. Naphade, A. A. Raut, A. keraliya,
More informationModifi ed CT perfusion contrast injection protocols for improved CBF quantifi cation with lower temporal sampling
Investigations and research Modifi ed CT perfusion contrast injection protocols for improved CBF quantifi cation with lower temporal sampling J. Wang Z. Ying V. Yao L. Ciancibello S. Premraj S. Pohlman
More informationSpectral CT imaging as a new quantitative tool? Assessment of perfusion defects of pulmonary parenchyma in patients with lung cancer
Original Article Spectral CT imaging as a new quantitative tool? Assessment of perfusion defects of pulmonary parenchyma in patients with lung cancer Ying-Shi Sun, Xiao-Yan Zhang, Yong Cui, Lei Tang, Xiao-Ting
More informationAcknowledgments. A Specific Diagnostic Task: Lung Nodule Detection. A Specific Diagnostic Task: Chest CT Protocols. Chest CT Protocols
Personalization of Pediatric Imaging in Terms of Needed Indication-Based Quality Per Dose Acknowledgments Duke University Medical Center Ehsan Samei, PhD Donald Frush, MD Xiang Li PhD DABR Cleveland Clinic
More informationLung Perfusion Analysis New Pathways in Lung Imaging. Case Study Brochure PLA 309 Hospital
Lung Perfusion Analysis New Pathways in Lung Imaging Case Study Brochure PLA 309 Hospital http://www.toshibamedicalsystems.com Toshiba Medical Systems Corporation 2012 all rights reserved. Design and specifications
More informationDual-Energy CT Applications in Radiation Therapy
THE UNIVERSITY OF WISCONSIN MADISON Dual-Energy CT Applications in Radiation Therapy - Jessica Miller 1 Disclosures Funding provided by Siemens Medical 2 Learning objectives General principles of dual
More informationX-Ray & CT Physics / Clinical CT
Computed Tomography-Basic Principles and Good Practice X-Ray & CT Physics / Clinical CT INSTRUCTORS: Dane Franklin, MBA, RT (R) (CT) Office hours will be Tuesdays from 5pm to 6pm CLASSROOM: TIME: REQUIRED
More informationLes Outils Cliniques de Demain en Scanner Cardiaque. Cardiaque Status en ECR 2018 From Diagnosis to Prognosis
ECR 2018 From Diagnosis to Prognosis ECR 2018 From Diagnosis to Prognosis Thursday, March 1, 2018/08:30-10:00/Room N Les Outils Cliniques de Demain en Scanner Cardiaque Cardiaque Status en 2018 Rodrigo
More informationCase Report Three-Dimensional Dual-Energy Computed Tomography for Enhancing Stone/Stent Contrasting and Stone Visualization in Urolithiasis
Case Reports in Urology Volume 2013, Article ID 646087, 4 pages http://dx.doi.org/10.1155/2013/646087 Case Report Three-Dimensional Dual-Energy Computed Tomography for Enhancing Stone/Stent Contrasting
More informationEstimating Iodine Concentration from CT Number Enhancement
Estimating Iodine Concentration from CT Number Enhancement Rosemary Eaton, Andrew Shah, Jane Shekhdar Medical Physics, Mount Vernon Hospital CT Users Group 4 th October 212, Edinburgh Summary Background
More informationAsk EuroSafe Imaging. Tips & Tricks. CT Working Group
Ask EuroSafe Imaging Tips & Tricks CT Working Group The use of bi-phase injection protocols to reduce the number of acquisition phases and radiation dose Alban Gervaise (Medical Imaging Department, HIA
More informationHow do the Parameters affect Image Quality and Dose for Abdominal CT? Image Review
How do the Parameters affect Image Quality and Dose for Abdominal CT? Image Review Mannudeep K. Kalra, MD, DNB Massachusetts General Hospital Harvard Medical School Financial Disclosure This presentation
More informationLiver Perfusion Analysis New Frontiers in Dynamic Volume Imaging. Case Study Brochure Chang Gung Memorial Hospital.
New Frontiers in Dynamic Volume Imaging dynamic volume CT Case Study Brochure Chang Gung Memorial Hospital http://www.toshibamedicalsystems.com Toshiba Medical Systems Corporation 2010-2011. All rights
More informationAt present, CT of the brain is the imaging technique of choice
ORIGINAL RESEARCH PATIENT SAFETY Acute Intracranial Hemorrhage in CT: Benefits of Sinogram-Affirmed Iterative Reconstruction Techniques B. Bodelle, E. Klein, N.N.N. Naguib, R.W. Bauer, J.M. Kerl, F. Al-Butmeh,
More informationLiver, Liver Fat, Fibrosis and HCC Screening with DECT
Liver, Liver Fat, Fibrosis and HCC Screening with DECT Dushyant Sahani, M.D Director of CT Associate Professor of Radiology Massachusetts General Hospital Harvard Medical School Email-dsahani@partners.org
More informationReducing Radiation Dose in Body CT: A Practical Approach to Optimizing CT Protocols
Medical Physics and Informatics Review Goldman and Maldjian Reducing Radiation Dose in ody CT Medical Physics and Informatics Review Downloaded from www.ajronline.org by lice Goldman on 03/26/13 from IP
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 informationAsk EuroSafe Imaging. Tips & Tricks. Paediatric Imaging Working Group. Shielding in pediatric CT
Ask EuroSafe Imaging Tips & Tricks Paediatric Imaging Working Group Shielding in pediatric CT Claudio Granata (IRCCS Istituto Giannina Gaslini, IT) Joana Santos (ESTeSC-Coimbra Health School, PT) Elina
More informationScientific Exhibit. Authors: D. Takenaka, Y. Ohno, Y. Onishi, K. Matsumoto, T.
The feasibility of biphasic contrast-media-injection-protocol for chest imaging on 320-slice volume MDCT: Direct comparison of biphasic and bolus contrast-media injection protocols on 320-slice volume
More informationImaging Decisions Start Here SM
Owing to its high resolution and wide anatomic coverage, dynamic first-pass perfusion 320-detector-row CT outperforms PET/CT for distinguishing benign from malignant lung nodules, researchers from Japan
More informationTo Shield or Not to Shield? Lincoln L. Berland, M.D.
To Shield or Not to Shield? Lincoln L. Berland, M.D. Disclosures Consultant to: Nuance, Inc. Page 2 Breast Radiation on CT Use of chest CT has increased in women vulnerable to cancer induction by radiation.
More informationManaging Radiation Risk in Pediatric CT Imaging
Managing Radiation Risk in Pediatric CT Imaging Mahadevappa Mahesh, MS, PhD, FAAPM, FACR, FACMP, FSCCT. Professor of Radiology and Cardiology Johns Hopkins University School of Medicine Chief Physicist
More informationIn routine clinical practice, the majority of single-source abdominal computed tomographic (CT) examinations are performed with a tube potential of 12
Note: This copy is for your personal, non-commercial use only. To order presentation-ready copies for distribution to your colleagues or clients, contact us at www.rsna.org/rsnarights. ORIGINAL RESEARCH
More informationUltralow Dose Chest CT with MBIR
Ultralow Dose Chest CT with MBIR Ella A. Kazerooni, M.D. Professor & Director Cardiothoracic Radiology Associate Chair for Clinical Affairs University of Michigan Disclosures Consultant: GE Healthcare
More informationAutomatic Patient Centering for MDCT: Effect on Radiation Dose
Patient Centering for MDCT CT Imaging Original Research Jianhai Li 1 Unni K. Udayasankar 1 Thomas L. Toth 2 John Seamans 2 William C. Small 1 Mannudeep K. Kalra 1,3 Li J, Udayasankar UK, Toth TL, Seamans
More informationVariation in tube voltage dependence of X-ray CT image contrast attributed to the difference of object materials
589-8511 377-2 565-0871 1-7 2008 9 19 2008 11 25 Variation in tube voltage dependence of X-ray CT image contrast attributed to the difference of object materials Tatsuo KONISHI, Yoshiyuki ASAI, Masanobu
More informationB. CT protocols for the spine
B. CT protocols for the spine Poster No.: A-003 Congress: ECR 2010 Type: Invited Speaker Topic: Neuro Authors: B. Tins; Oswestry/UK Keywords: CT, spine, diagnostic imaging protocol DOI: 10.1594/ecr2010/A-003
More informationTypical PET Image. Elevated uptake of FDG (related to metabolism) Lung cancer example: But where exactly is it located?
Typical PET Image Elevated uptake of FDG (related to metabolism) Lung cancer example: But where exactly is it located? PET/CT Oncology Imaging Anatometabolic fusion images are useful in the management
More informationAnatomical and Functional MRI of the Pancreas
Anatomical and Functional MRI of the Pancreas MA Bali, MD, T Metens, PhD Erasme Hospital Free University of Brussels Belgium mbali@ulb.ac.be Introduction The use of MRI to investigate the pancreas has
More informationDual-Energy Imaging of Bone Marrow Edema on a Dedicated Multi-Source Cone-Beam CT System for the Extremities
Dual-Energy Imaging of Bone Edema on a Dedicated Multi-Source Cone-Beam CT System for the Extremities W Zbijewski, 1 A Sisniega, 1 JW Stayman, 1 N Packard, 2 J Yorkston, 2 G Thawait, 3 S Demehri, 3 J Fritz,
More informationUniversity of Groningen. Quantitative CT myocardial perfusion Pelgrim, Gert
University of Groningen Quantitative CT myocardial perfusion Pelgrim, Gert IMPORTANT NOTE: You are advised to consult the publisher's version (publisher's PDF) if you wish to cite from it. Please check
More informationAsk EuroSafe Imaging. Tips & Tricks. CT Working Group. Optimization of scan length to reduce CT radiation dose
Ask EuroSafe Imaging Tips & Tricks CT Working Group Optimization of scan length to reduce CT radiation dose Alban Gervaise (Centre Hospitalier Universitaire Nancy, FR) Mika Kortesniemi (HUS Medical Imaging
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 informationGemstone Spectral Imaging quantifies lesion characteristics for a confident diagnosis
GE Healthcare Gemstone Spectral Imaging quantifies lesion characteristics for a confident diagnosis CT clinical case study lesion characterization Desiree Morgan, MD Vice Chair of Clinical Research Professor
More informationTranslating Protocols Across Patient Size: Babies to Bariatric
Translating Protocols Across Patient Size: Babies to Bariatric Cynthia H. McCollough, PhD, FACR, FAAPM Professor of Radiologic Physics Director, CT Clinical Innovation Center Department of Radiology Mayo
More informationPhoton Attenuation Correction in Misregistered Cardiac PET/CT
Photon Attenuation Correction in Misregistered Cardiac PET/CT A. Martinez-Möller 1,2, N. Navab 2, M. Schwaiger 1, S. G. Nekolla 1 1 Nuklearmedizinische Klinik der TU München 2 Computer Assisted Medical
More informationBone Densitometry Radiation dose: what you need to know
Bone Densitometry Radiation dose: what you need to know John Damilakis, PhD Associate Professor and Chairman University of Crete, Iraklion, Crete, GREECE Estimation of bone status using X-rays Assessment
More informationDual Energy CT of the Heart: Perfusion and Beyond
Dual Energy CT of the Heart: Perfusion and Beyond U. Joseph Schoepf, MD, FAHA, FSCBT MR, FSCCT Professor of Radiology, Medicine, and Pediatrics Director of Cardiovascular Imaging Disclosures Consultant
More informationIntroduction Pediatric malignancies Changing trends & Radiation burden Radiation exposure from PET/CT Image gently PET & CT modification - PET/CT
Introduction Pediatric malignancies Changing trends & Radiation burden Radiation exposure from PET/CT Image gently PET & CT modification - PET/CT protocols Tips Leukaemia / lymphoma: ~ 35% acute lymphoblastic
More informationUtility of Variable Helical Pitch CT Scanning Technique for CT Angiography of Aortoiliac and Lower Extremity Arteries
Utility of Variable Helical Pitch CT Scanning Technique for CT Angiography of Aortoiliac and Lower Extremity Arteries Poster No.: C-0863 Congress: ECR 2015 Type: Scientific Exhibit Authors: A. Nakamoto,
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 informationBODY TOMOSYNTHESIS A. INTRODUCTION/CURRENT PRACTICE. Conventional radiography (X-ray)
BODY TOMOSYNTHESIS A. INTRODUCTION/CURRENT PRACTICE MAGNUS BÅTH, UNIVERSITY OF GOTHENBURG AND SAHLGRENSKA UNIVERSITY HOSPITAL, SWEDEN Conventional radiography (X-ray) Still fundamental examination in radiology
More informationCT Urography. Ureter. Stuart G. Silverman, M.D.
CT Urography Stuart G. Silverman, M.D. Professor of Radiology Harvard Medical School Director, Abdominal Imaging and Intervention Brigham and Women s Hospital Ureter Boston, MA CT Urography Stuart G. Silverman,
More informationAnthem Blue Cross and Blue Shield Virginia Advanced Imaging Procedures Requiring Precertification Revised 02/13/2013
Anthem Blue Cross and Blue Shield Virginia Advanced Imaging Procedures Requiring Precertification Revised 02/13/2013 Modality and CT Head CTA Head: Cerebrovascular MRI Head MRA Head: Cerebrovascular Functional
More informationPediatric chest HRCT using the idose 4 Hybrid Iterative Reconstruction Algorithm: Which idose level to choose?
Journal of Physics: Conference Series PAPER OPEN ACCESS Pediatric chest HRCT using the idose 4 Hybrid Iterative Reconstruction Algorithm: Which idose level to choose? To cite this article: M Smarda et
More informationDeveloping a Statistical Method of Quantifying Vascular Response after Radiotherapy Co-supervised by Dr. Glenn Bauman and Dr.
6 Week Project Developing a Statistical Method of Quantifying Vascular Response after Radiotherapy Co-supervised by Dr. Glenn Bauman and Dr. Slav Yartsev Michal Stankiewicz April 9, 2013 Medical Biophysics,
More informationPaediatric Dose Reduction and Image Quality
Paediatric Dose Reduction and Image Quality Alan Whiteside The majority of this work was undertaken as part of MSc Thesis of Helen Dixon. Introduction Paediatric CT protocols result in a higher effective
More informationHHS Public Access Author manuscript Abdom Imaging. Author manuscript; available in PMC 2017 June 27.
Motion Artifacts in Kidney Stone Imaging Using Single-Source and Dual-Source Dual-Energy CT Scanners. A Phantom Study El-Sayed H. Ibrahim 1,2,*, Joseph G. Cernigliaro 1, Robert A. Pooley 1, James C. Williams
More informationRadiation Dose Reduction: Should You Use a Bismuth Breast Shield?
Radiation Dose Reduction: Should You Use a Bismuth Breast Shield? Lincoln L. Berland, M.D., F.A.C.R. Michael V. Yester, Ph.D. University of Alabama at Birmingham Breast Radiation on CT Use of chest CT
More informationReducing Radiation Dose in Body CT: A Primer on Dose Metrics and Key CT Technical Parameters
Medical Physics and Informatics Review Maldjian and Goldman Reducing Radiation Dose in Body CT Medical Physics and Informatics Review FOCUS ON: Pierre D. Maldjian 1 Alice R. Goldman Maldjian PD, Goldman
More informationRADIATION PROTECTION IN DIAGNOSTIC AND INTERVENTIONAL RADIOLOGY. L19: Optimization of Protection in Mammography
IAEA Training Material on Radiation Protection in Diagnostic and Interventional Radiology RADIATION PROTECTION IN DIAGNOSTIC AND INTERVENTIONAL RADIOLOGY L19: Optimization of Protection in Mammography
More informationCT angiography techniques. Boot camp
CT angiography techniques Boot camp Overview Basic concepts Contrast administration arterial opacification Time scan acquisition during the arterial phase Protocol examples Helical non-gated CTA Pulmonary
More informationCT Perfusion. U. Joseph Schoepf, MD, FAHA, FSCBT MR, FSCCT Professor of Radiology, Medicine, and Pediatrics Director of Cardiovascular Imaging
CT Perfusion U. Joseph Schoepf, MD, FAHA, FSCBT MR, FSCCT Professor of Radiology, Medicine, and Pediatrics Director of Cardiovascular Imaging Disclosures Consultant for / research support from Bayer Bracco
More informationCustomizing Contrast Injection for Body MDCT: Algorithmic Approach
Customizing Contrast Injection for Body MDCT: Algorithmic Approach Lincoln L. Berland, M.D., F.A.C.R. University of Alabama at Birmingham Before Contrast Prep and Hydration Hydration single most important
More informationDual-Energy CT for Quantification of Urinary Stone Composition in Mixed Stones: A Phantom Study
Genitourinary Imaging Original Research Leng et al. Dual-Energy CT of Urinary Stones Genitourinary Imaging Original Research Shuai Leng 1 Alice Huang 1 Juan Montoya Cardona 1 Xinhui Duan 1,2 James C. Williams
More informationGender differences in CT calcium scoring: A phantom study
Gender differences in CT calcium scoring: A phantom study Nicholas Petrick, Qin Li, Benjamin Berman, Marios A Gavrielides, Rongping Zeng, Berkman Sahiner CDRH/OSEL/DIDSR U.S. Food and Drug Administration
More informationAccuracy of iodine quantification using dual energy CT in latest generation dual source and dual layer CT
Eur Radiol (2017) 27:3904 3912 DOI.07/s00330-017-472-9 CARDIAC Accuracy of iodine quantification using dual energy CT in latest generation dual source and dual layer CT Gert Jan Pelgrim 1 & Robbert W.
More informationYoshihisa Tsuji, Naoki Takahashi, Joel G. Fletcher, David M. Hough, Brendan P. McMenomy, Cynthia H McCollough, Katharine L. Grant, Ernst Klotz
Prediction of pancreatic necrosis in early stage of acute pancreatitis using subtraction color map images created from contrast-enhanced and unenhanced CT. Yoshihisa Tsuji, Naoki Takahashi, Joel G. Fletcher,
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 informationWhen You Need To Know More.
www.siemens.com/ultrasound When You Need To Know More. ACUSON S2000 Ultrasound System Table of Contents Powerful Imaging 01 Penetrating Insight 02 03 Revealing Perspectives 04 05 Smart Workflow 06 Ergonomics
More informationDual energy computed tomography for non-invasive differentiation of renal stone composition
Dual energy computed tomography for non-invasive differentiation of renal stone composition Poster No.: C-0079 Congress: ECR 2012 Type: Scientific Exhibit Authors: R. D. Langer, K. F. W. Neidl van Gorkom,
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 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 informationInitial Assessment of Dual-Energy CT in Patients With Gallstones or Bile Duct Stones: Can Virtual Nonenhanced Images Replace True Nonenhanced Images?
Gastrointestinal Imaging Original Research Kim et al. Evaluation of Biliary Stones Gastrointestinal Imaging Original Research Ji Eun Kim 1 Jeong Min Lee 2 Jee Hyun Baek 2 Joon Koo Han 2 Byung Ihn Choi
More informationClinical Image Gallery Next Generation Volume 1
Clinical Image Gallery Next Generation Volume 1 Dr. Russell Bull Royal Bournemouth Hospital, Bournemouth, United Kingdom After long experience with the first generation, a next generation Aquilion ONE
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 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 informationQuantitative CT in Chronic Obstructive Pulmonary Disease: Inspiratory and Expiratory Assessment
Cardiopulmonary Imaging Original Research kira et al. CT of Chronic Obstructive Pulmonary Disease Cardiopulmonary Imaging Original Research Masanori kira 1 Kazushige Toyokawa 1 Yoshikazu Inoue 2 Toru rai
More informationI. Equipments for external beam radiotherapy
I. Equipments for external beam radiotherapy 5 linear accelerators (LINACs): Varian TrueBeam 6, 10 & 18 MV photons, 6-18 MeV electrons, image-guided (IGRT) and intensity modulated radiotherapy (IMRT),
More informationEvaluation and treatment of intracranial aneurysms using Dual Energy CT Angiography (DECTA) and rotational Digital Subtraction Angiography (DSA).
Evaluation and treatment of intracranial aneurysms using Dual Energy CT Angiography (DECTA) and rotational Digital Subtraction Angiography (DSA). L. Testaverde, G. Pelle, A. Saltarelli, P. Rabuffi, M.
More informationCT NUMBER ACCURACY ANALYSIS FOR RADIOTHERAPY TREATMENT PLANNING IMAGING
CT NUMBER ACCURACY ANALYSIS FOR RADIOTHERAPY TREATMENT PLANNING IMAGING Julian Liu a, Keisha Robinson a, DhanaJayan Kothandan a and Joshua Luis b (a) Cancer Centre London (b) University College London
More informationRadiation dose reduction in computed tomography: techniques and future perspective
REVIEW Radiation dose reduction in computed tomography: techniques and future perspective Despite universal consensus that computed tomography (CT) overwhelmingly benefits patients when used for appropriate
More informationChapter 6. Hester Gietema Cornelia Schaefer-Prokop Willem Mali Gerard Groenewegen Mathias Prokop. Accepted for publication in Radiology
Chapter 6 Interscan variability of semiautomated volume measurements in intraparenchymal pulmonary nodules using multidetector-row computed tomography: Influence of inspirational level, nodule size and
More informationPerfusion Measurement in Acute Pancreatitis Using Dynamic Perfusion MDCT
Perfusion Measuremen t in cute Pancreatitis with MDT Gastrointestinal Imaging Technical Innovation M E D E N T U R I L I M G I N G Pierre E. Bize 1 lexandra Platon hristoph D. Becker Pierre-lexandre Poletti
More informationFunctional CT imaging techniques for the assessment of angiogenesis in lung cancer
Perspective Functional CT imaging techniques for the assessment of angiogenesis in lung cancer Thomas Henzler 1, Jingyun Shi 2, Hashim Jafarov 1, Stefan O. Schoenberg 1, Christian Manegold 3, Christian
More informationCT Myocardial Perfusion: Is there Added Value to Coronary CT?
CT Myocardial Perfusion: Is there Added Value to Coronary CT? U. Joseph Schoepf, MD, FAHA, FSCBT MR, FSCCT Professor of Radiology, Medicine, and Pediatrics Director of Cardiovascular Imaging Disclosures
More informationRadiation Exposure in Pregnancy. John R. Mayo UNIVERSITY OF BRITISH COLUMBIA
Radiation Exposure in Pregnancy John R. Mayo UNIVERSITY OF BRITISH COLUMBIA Illustrative Clinical Scenario 32 year old female 34 weeks pregnant with recent onset shortness of breath and central chest pain
More informationCT of the chest with model-based, fully iterative reconstruction: comparison with adaptive statistical iterative reconstruction
Ichikawa et al. BMC Medical Imaging 2013, 13:27 RESEARCH ARTICLE Open Access CT of the chest with model-based, fully iterative reconstruction: comparison with adaptive statistical iterative reconstruction
More informationFOR CMS (MEDICARE) MEMBERS ONLY NATIONAL COVERAGE DETERMINATION (NCD) FOR COMPUTED TOMOGRAPHY:
National Imaging Associates, Inc. Clinical guidelines CHEST CTA Original Date: September 1997 Page 1 of 5 CPT Codes: 71275 Last Review Date: August 2014 NCD 220.1 Last Effective Date: March 2008 Guideline
More informationUpdates in Mammography. Dr. Yang Faridah A. Aziz Department of Biomedical Imaging University Malaya Medical Centre
Updates in Mammography Dr. Yang Faridah A. Aziz Department of Biomedical Imaging University Malaya Medical Centre Updates in Mammography Breast Imaging Dr. Yang Faridah A. Aziz Department of Biomedical
More informationWednesday 12 September Advanced imaging science to practice 14:30 14:55. Recent advances in computed tomography (CT) technology
14:30 14:55 Recent advances in computed tomography (CT) technology Dr Gareth Iball, Leeds Teaching Hospitals NHS Trust All modern CT systems incorporate iterative reconstruction (IR) techniques. Their
More informationBiomarkers and the Future of. John R. Votaw CBIS 5 th Year Anniversary Celebration/Look to the future February 8, 2013
Biomarkers and the Future of Radiology John R. Votaw CBIS 5 th Year Anniversary Celebration/Look to the future February 8, 2013 Statistics/Radiology Collaboration The utility of Radiologic procedures
More informationPulmonary Nodule Volumetric Measurement Variability as a Function of CT Slice Thickness and Nodule Morphology
CT of Pulmonary Nodules Chest Imaging Original Research Myria Petrou 1 Leslie E. Quint 1 in Nan 2 Laurence H. aker 3 Petrou M, Quint LE, Nan, aker LH Keywords: chest, lung disease, MDCT, oncologic imaging,
More informationSubarachnoid hemorrhage is defined as the extravasation of
Published January 22, 2015 as 10.3174/ajnr.A4223 ORIGINAL RESEARCH BRAIN Evaluation of Virtual Noncontrast Images Obtained from Dual- Energy CTA for Diagnosing Subarachnoid Hemorrhage X.Y. Jiang, S.H.
More informationVascular and Interventional Radiology Original Research
Vascular and Interventional Radiology Original Research Apfaltrer et al. High-Pitch Versus Standard-Pitch CTA of the Aorta Vascular and Interventional Radiology Original Research Paul Apfaltrer 1,2 E.
More information