Big Data, Watson and the Digital Healthcare Provider of the Future

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1 Big Data, Watson and the Digital Healthcare Provider of the Future Eliot Siegel, MD, FACR, FSIIM Professor and Vice Chair University of Maryland School of Medicine Department of Diagnostic Radiology Professor Computer Science University of Maryland Baltimore County Professor Biomedical Engineering University of Maryland College Park

2 ACR Digital Art Forms Life images Amalga Anatomic Travelogue Anthro Applied Radiology ATL Barco Bracco Carestream Dejarnette Dell Diagnostic Imaging Disclosures Securfinity Dynamic Imaging Eizo Fovia Fuji Herman Miller IBM Intel JEC Kodak NIBIB NIST NLM NCI McKesson Medrad Medscape Merge Microsoft Mindshare Montage GE Paxeramed Philips RadLogics Radsite Redrick/Evolve RSNA Siemens SIIM Sonare Steelcase TeraRecon Toshiba Virtual Radiology Vital Images Xybix YYESIT Zebra

3 2004 Kick-off for National EMR Initiative by George W. Bush

4 Personalized Medicine Example: Patients have major positive response to chemotherapy for pancreatic carcinoma in only 8% of the time and called a failure, but what if you could identify 95% of those 8% of patients?

5 This Lack of Use of Computers for Diagnostic and Therapeutic Decision Support Current Anecdotal Practice of Medicine and Diagnostic Imaging will Make it Seem Like 2016 was Flintstone Era in 10 to 20 Years

6 Big Data Will Play a Critical Role in Helping in the Practice of Clinical Radiology? What is Big Data? Currently one of the hottest topics in medicine from both a research and clinical perspective Impossible to get any consensus on its definition and it seems to vary depending on one s perspective The National Institute of Standards and Technology defines big data as that which exceed(s) the capacity or capability of current or conventional methods and systems

7 28

8 Whichever of the above or other definitions that we may use when thinking of Big Data, medicine and in specific, diagnostic imaging clearly generates vast amounts of it particularly high dimensional data

9 Personalized/Precision Medicine: Most Recently Closely Associated with Genomics The term personalized medicine or precision medicine came up in President Obama s 2015 State of the Union Address It has recently been widely applied to describe the concept of providing medical care based on genetic differences between patients Access to genetic information will radically change the way medicine is practiced

10 Personalized Medicine In the near future, detailed information about each patient s unique genetic makeup will be available to their doctors It will be used in the selection of the best specific diagnostic and therapeutic methods for caring for that individual and for the more general purposes of lifestyle and/or wellness counseling

11 Personalized Medicine: Clinical Implications in Oncology The use of genomics in oncology, for example is tied to the recognition that prognosis and treatment response depend on the molecular pathway for a cancer rather than simply its diagnosis or appearance at pathology/histology

12 23 and Me

13

14 When Mining Big Data, Every Patient s Medical Care Becomes a Clinical Trial Rather than relying on a small study, or oncologist s personal experience, each patient s clinical course and data will be saved and made available for decision support rather than just the 2-3% of oncology patients that are currently enrolled in clinical trials

15 If Medical Parameters Represent Complex, Big Data, Imaging is Arguably Orders of Magnitude More So Compared with Even Genomic, Proteomic Data Imaging characterized by large number of studies with more sequences, images per study and large variety of different imaging procedures but this is not quite big data MRI T1, T2, Proton density, Echo planar, Inversion Recovery, Perfusion, Diffusion-Kurtosis, Spectroscopy, many contrast agents and many sequences US Contrast, elastography, flow CT Dynamic contrast Multi-spectral

16 Molecular Imaging/PET Parameters Dozens radiopharmaceuticals PET Glucose utilization: FDG, Tumor Cellular Proliferation: 18F-FLT-PET and tumor cellular proliferation Tumor Hypoxia: [18F]fluoromisonidazole (F-MISO) Apoptosis: [ 18 F]ICMT-11 Additional PET [18F]fluoroethyl-l-tyrosine (FET) [18F]fluoro-α-methyltyrosine (FMT) 6-[18F]fluoro-dihydroxy-l-phenylalanine (F-DOPA [11C]choline (CHO) and [18F]choline.

17 How Big is Big Data in Imaging? Medical images are large and it s been suggested that they represent more than 90% of the total storage space in healthcare systems but this is not what we mean by big data The number of imaging studies performed has increased precipitously but this is not what I think of as big data Unlike other healthcare data, medical images are extraordinarily complex and contain vast hidden amounts of information that go largely untapped

18 Radiology as Dark Matter 39 As with Dark matter (27% of the entire universe)/dark energy (68% of the universe), only 5% of the universe is observable with our current instruments This is similar to the case in radiology where even a smaller percentage of our image data is in our interpretation and the vast majority locked up within the images themselves

19 40 Why Do You Keep Your Images? Ask a Radiologist/Nuclear Medicine Physician Answer: Medico-legal reasons Ask endoscopist why you don t keep your images Answer: Medico-legal reasons! So we keep our images because there is a gold mine of additional data not just to document that the study was interpreted accurately! But how can we make all of that pixel data available for medical decision support as part of Big Data?

20 Imaging As Physical Exam - Capturing that Dark Matter Pipeline of Algorithms and then Store AIM/XML Tags 1,000 s of parameters can be discerned for future indexing and reference from a single, for example, CT pulmonary angiogram Automatic evaluation of contrast enhancement efficacy Positive or negative for PE Lung Nodules Bone mineral density Calcium score Cardiac chamber size COPD Index Lung texture Cystic changes Pulmonary vascular assessment Lung volumes Liver size and texture Pleural calcifications Renal artery disease Gallstones 1000s more could be noted by human or computer observer

21 Advice for Mr. Akami Your Next Door Neighbor Your next door neighbor and friend, Mr. Akami, a 62 year old native Hawaiian smoker with COPD who is referred for a screening study due to age and smoking history 7 mm spiculated soft tissue density left lower lobe nodule is discovered What is the likelihood that it is malignant? How should this nodule be followed up?

22 Lung RADS Version 1.0 Assessment Categories Release date: April 28, 2014

23 Fleischner Society Guidelines Not Appropriate for Screening Study

24 ACR LungRads Guideline Recommendations His doctor told him that based on ACR Lung Rad guidelines he should get a follow-up in six months (guidelines for 7 mm nodule 6 month follow up LDCT) Mr. Akami says that he has a family history of lung cancer and has lost friends to the disease and wonders whether a six month follow-up is really the best thing for him

25 What Are the Keys to Being Able to Answer Mr. Akami s Question About Having Lung Cancer? With low dose Screening CT, we have a biomarker for the detection of a lung nodule on CT Do we have the informatics infrastructure to allow us to reliably acquire, measure, archive, and analyze the data? Do we have the computer power/techniques to perform the analysis and can we incorporate these into our routine clinical practice? How reliable are those measurements? Can we incorporate these into routine workflow?

26 What are the characteristics of CT biomarkers for lung cancer, e.g. shape, density, location, size of the lung nodule? How accurate are these? Is there an estimate of error? Do we have databases that we can use as a reference? Can we personalize recommendations for Mr. Akami, e.g. history of previous or current cancer, was this nodule seen previously, ethnicity, occupation, age, smoking history, weight, diet, etc. Can we add a priori probability that Mr. Akami will develop lung cancer (before we knew about his lung nodule); i.e. his pre-test probability?

27 Informatics Infrastructure

28 Top Seven Informatics Challenges to Medical Imaging

29 #7 Lack of Acquisition Standards Without an acquisition template or standard measurements will be of limited value We have demonstrated major differences in image analysis based on different acquisition parameters UPICT (uniform protocols in clinical trials) For CT impact of dose and reconstruction kernel for example can change apparent size of lung lesion

30 #6 Lack of a Radiology Lexicon Limited radiology terminology in Snomed CT (Systematized Nomenclature of Medicine Clinical Terms) or UMLS (Unified Medical Language System) Current general medical lexicons only include about 20% of terms used in radiology reports Don t have consensus on acquisition parameters such as MRI sequences including GRASS, ROAST, etc. to describe acquisition standards RadLex and the Radlex Playbook address these challenges

31 #5 Difficulty Quantifying Lesion Size and Change over Baseline Percentage Change in the measurement Time % Change % 1 2 Measurement technique RECIST -40.7% Volume 1 month follow up If imaging is to be successful as a biomarker it is critical that change in an image over time can be quantified Need to determine how best to determine lesion size and/or volume and accuracy of measurement The QIBA Quantitative Imaging Biomarkers Alliance led by Daniel Sullivan has tackled this challenge

32 #4 Lack of (Adoption of) Annotation and Mark-up Standards (Critical) There is currently no consensus on image mark ups and annotation making anything done on one workstation unlikely to be accessible on another one AIM Standard developed by cabig working group at National Cancer Institute has not been widely adopted yet

33 #3 Multiple Image Interpretation Platforms with Different Software Makes Comparison of Results and Sharing of Results Difficult There is a wide variation in imaging software in quantitative analysis XIP (Extensible Imaging Platform) Lung nodule size and volume for example, are measured differently by different quantitative analysis software

34 #2 Lack of Standardized Reference Image Sets and Phantoms NCI s TCIA and RSNA QIBA Archive Address This

35 #1 Challenge to Promote Sharing of Images and Related Data Images associated with clinical trials should be available for users after the study is completed and when approved by the principal investigators, while the study is underway This could make images available to investigators and industry without the huge expenses and amount of time and dollars typically required for a study involving clinical images

36 How Can We Create Quantitative Tags in Our Images? 57

37 Template Guides Radiologist Through Findings in Structured Way and then Saves to AIM Data Service And Search is Made for Similar Patients

38 Tagging Images To Support Phenotype/Genotype Clinical Analysis Image Image Annotation Data Genomic & Clinical Analytic Results

39 KM Plot For Specific Patient Based on TCGA Database

40 We Are Still Practicing in the Anecdotal Non-Data Driven, Flintstone Era of Medicine 61

41 Do We Have the Computer Power to Help Mr. Akami? 2011 will likely be remembered as the year of the re-emergence of artificial intelligence in medicine with Watson and of course, Siri, arguably the best feature of the new iphone 4S and 5

42 Ultimate Challenge: Medical Imaging Scientific American June 2011 Testing for Consciousness Alternative to Turning Test Highlights for Kids What s Wrong with this Picture? Christof Koch and Giulio Tononi

43 Imaging May Be Ultimate/Future Frontier For AI Software Such as Watson

44 What are Sources of Data for Decision Support for Mr. Akami? Institutional Database: VA s Corporate Data Warehouse Vinci and GPRD in UK

45 Discovering Other Untapped, Disconnected Gold Mines of Clinical and Research Data: Clinical Trials Despite all of the advances in computer technology we are arguably still at the paper stage of research as far as ability to discover and combine important data Research data including those associated with major medical journals and clinical trials are typically created for a single purpose and beyond a one or two manuscripts, remain largely locked up or inaccessible Even when the data are made accessible, they are typically associated with limited access through a proprietary Internet portal or even by requesting data on a hard drive Often requires submission of a research plan and data and then a considerable wait for permission to use the data which is often not granted

46 CTEP (NIH Cancer Therapy Evaluation Program) Pediatric Brain Tumor Consortium As an NCI funded Consortium, the Pediatric Brain Tumor Consortium (PBTC) is required to make research data available to other investigators for use in research projects An investigator who wishes to use individual patient data from one or more of the Consortium's completed and published studies must submit in writing: Description of the research project Specific data requested List of investigators involved with the project Affiliated research institutions Copy of the requesting investigator's CV must also be provided. The submitted research proposal and CV shall be distributed to the PBTC Steering Committee for review Once approved, the responsible investigator will be required to complete a Material and Data Transfer Agreement as part of the conditions for data release Requests for data will only be considered once the primary study analyses have been published

47 Discovering and Consuming Databases At best, freely sharable databases are accessed using their own idiosyncratic web portal Currently no index of databases or their content No standards exist to describe how databases can advertise their content and availability (free or business model) and their data provenance and sources and peer review, etc. Would be wonderful project for NLM to investigate the creation of an XML standard for describing the content of databases This will be critical to the continuing success of the Watson project in my opinion

48 Back to Our Next Door Neighbor Mr. Akami Your next door neighbor and friend, Mr. Akami, a 62 year old native Hawaiian smoker with COPD who gets admitted for an elective Bunionectomy 7 mm spiculated soft tissue density left lower lobe nodule is discovered on routine pre-op exam and confirmed on CT with no other abnormalities What is the likelihood that it is malignant? How should this nodule be followed up? Do we have tools at the workstation while reporting to help apply the ACR LungRads criteria to help out the radiologist?

49 ACR Assist-Clinical Decision Support Framework For Radiologists Incorporated into Reporting Systems

50 Lung-RADS App. By Chris Wald, MD

51 National Lung Screening Trial Dataset and Decision Support Project Taking Personalization to the Next Level Beyond LungRads Reporting Tool Can we personalize the ACR Lung Rads criteria using data from the National Lung Screening Trial? Could the criteria for follow-up be refined and personalized more than high risk smoker vs. lower risk patient based on: Geographic location? Patient age/sex? Characteristics of nodule e.g. shape (spiculated or smoothly rounded), containing calcification? Presence of additional nodules?

52 Personalized Characterization of Nodule Cancer Risk Beyond Lung-Rads 1.0 with NLST Data Michael A Morris, MD, MS; Jason Hostetter, MD; Babak Saboury, MD; Jim Morrison, MD; Kenneth Wang, MD,PhD; Jean Jeudy, MD; Eliot L Siegel, MD. University of Maryland Medical Center Department of Diagnostic Radiology and Nuclear Medicine

53 National Lung Screening Trial (NLST) 26,721 participants 32,289 nodules

54 NLST Personalized Lung Nodule Diagnosis and Treatment

55

56

57 5% of Nodules for Males 60 to 65 that were 5-7mm were Malignant

58 N/A <1% 1-2% 5-15% 0 1, 2 3 4A >15% 4B Mr. Akami category 3 suggesting 1-2% prob. of malignancy with 6 month follow-up

59

60

61

62 Now Add Nodule Shape Matching To Further 83 Personalize and Refine Accuracy

63 Next Step: Pixel Analysis NLST Images Demonstrated at RSNA Centennial Exhibit Statistics Features 1. Center Of Gravity 2. Histogram 3. Kurtosis 4. Maximum 5. Maximum Index 6. Mean 7. Median 8. Minimum 9. Minimum Index 10. Skewness 11. Standard Deviation 12. Sum 13. Variance 14. Weighted Elongation 15. Weighted Flatness 16. Weighted Principal Axes 17. Weighted Principal Moments Shape Features 1. Bounding Box 2. Centroid 3. Elongation 4. Equivalent Ellipsoid Diameter 5. Equivalent Spherical Perimeter 6. Equivalent Spherical Radius 7. Feret Diameter 8. Flatness 9. Number Of Pixels 10. Number Of Pixels On Border 11. Perimeter 12. Perimeter On Border 13. Perimeter On Border Ratio 14. Physical Size 15. Principal Axes 16. Principal Moments 17. Roundness

64 Can We Further Refine Estimate of Likelihood of Malignancy by Establishing Pre-test Probability of Lung Cancer in Mr. Akami to assist in Dx and Rx?

65 Establishing Pre Test Probability for Cancer using PLCO Published in 2009, the PLCO Screening Trial enrolled ~155,000 participants to determine whether certain screening exams reduced mortality from prostate, lung, colorectal and ovarian cancer The Prostate, Lung, Colorectal and Ovarian Cancer (PLCO) Screening Trial dataset provides an unparalleled resource for matching patients with the outcomes of demographically or diagnostically comparable patients These matched data can be used to inform a more sophisticated, personalized diagnostic decision-making process by tailoring imaging and testing follow-up intervals or even guiding intervention and prognosis They can also be incorporated into CAD algorithms to improve diagnostic efficacy by provided a priori likelihood of disease information.

66 PLCO Dataset

67 PLCO Demo 88

68 PLCO Published in 2009, the PLCO Screening Trial enrolled ~155,000 participants to determine whether certain screening exams reduced mortality from prostate, lung, colorectal and ovarian cancer The Prostate, Lung, Colorectal and Ovarian Cancer (PLCO) Screening Trial dataset provides an unparalleled resource for matching patients with the outcomes of demographically or diagnostically comparable patients These matched data can be used to inform a more sophisticated, personalized diagnostic decision-making process by tailoring imaging and testing follow-up intervals or even guiding intervention and prognosis They can also be incorporated into CAD algorithms to improve diagnostic efficacy by provided a priori likelihood of disease information.

69 PLCO Dataset

70 NuggetMiner 91

71 Instant Research Personalized Clinical Care 92

72 PLCO Participants Who Qualify for NLST 93

73 Creating Local/Regional Databases from Clinical Data Would also like to be able to collect data at the University of Maryland, within the Department of Veterans Affairs Hospitals in Maryland and then nationally that could establish a similar database Then could provide report that gave reference database such as NLST with likelihood of malignancy and also gave local reference to a specific population and then taking into account PLCO data

74 NLST and PLCO Next Steps Huge implications for screening, e.g. reduce cost from over $200,000 per life saved for smokers over 50 years old to a lower cost for a higher risk cohort for screening studies PLCO use has major implications for Bayesian pre-test probability data to assist in diagnosis Working with multiple vendors, demonstrating ability to incorporate this into the workflow with ability to click on nodule and then have automated lesion characterization, lookup from EMR and then access reference database service to get information about likelihood of malignancy

75 Would like to incorporate these data into routine applications such as CAD software that could take a priori probability of disease to help to CAD x in addition to current CAD e, e.g. if patient had prior breast cancer CAD should realize odds of another breast cancer higher and adjust accordingly Would like to create on the fly statistical/machine learning models rather than just finding similar patients in databases such as NLST or PLCO 96

76 Conclusion 97 We already have the pieces we need to help to make Mr. Akami and his physician make informed, data driven decisions rather than the anecdotal or one size fits all ones we have used in the past Radiology s biomarkers can be utilized to establish data that can be referred to as Radiomics, analogous to Genomics and can make these data available for decision support

77 Conclusion 98 This will revolutionize the practice of medicine and the practice of diagnostic imaging What we have done with the NLST and PLCO databases can be done with other Clinical Trial and Clinical databases to create resources for data driven decisions about patient diagnosis, follow-up, treatment, and prognosis

78 Conclusion 99 The major missing components are a culture of sharing that leads to lack of access for clinical purposes to clinical trial and patient EMR databases, lack of integration of data analytic services into the clinical workflow We owe it to Mr. Akami and millions of other patients around the world to change that culture and take advantage of the amazing advances in machine learning and high performance computing in diagnostic imaging

79 Big Data, Watson and the Digital Healthcare Provider of the Future Eliot Siegel, MD, FACR, FSIIM Professor and Vice Chair University of Maryland School of Medicine Department of Diagnostic Radiology Professor Computer Science University of Maryland Baltimore County Professor Biomedical Engineering University of Maryland College Park

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