CERRAF (formerly GERRAF) Fellows and Research Projects

Many of today's emerging leaders in academic radiology are CERRAF Fellows. The scope and diversity of the research projects selected by the CERRAF Fellows reflect the enormous opportunity it provides to pursue meaningful research in many areas of technology assessment and patient outcomes.

2024

  • Jonathan D. Lindquist, MD, University of Colorado School of Medicine; Randomized Phase II Trial and Conjoint Analysis of Patient Preference for Rectal Artery Embolization versus Operative Hemorrhoidectomy to Treat Bleeding Internal Hemorrhoids 
  • Hannah S. Milch MD, Department of Radiological Sciences - UCLA David Geffen School of Medicine; Automation Bias from Use of Artificial Intelligence in Screening Mammography
  • Derek L Nguyen, MD, Duke University Medical Center; Dynamic Educational Tool to Improve Radiologists’ and AI’s Decision Making of Indeterminant Calcifications

 

2023

  • Florence X. Doo, MD, MA, University of Maryland; The Carbon Footprint of Radiology Artificial Intelligence: Assessing the Impact of Cloud Computing on Climate Change and Health Outcomes
  • Yan Epelboym, MD, MPH Brigham and Women’s Hospital; Prospective Randomized Controlled Trial Evaluating Transcatheter Arterial Embolization as a Treatment for Painful Rotator Cuff Tendinopathy Refractory to Non-Surgical Management 
  • Marissa B. Lawson, MD, University of Washington; Disparities in Diagnostic Work-Up and Outcomes after Abnormal Screening Mammography

2022

  • Patricia Balthazar, MD, Emory University School of Medicine; Patient Reminders and Self-referrals Via Online Patient Portals and Text Messaging (PReVenT) to Improve Adherence to Breast Cancer Screening
  • Paul M. Bunch, MD, Wake Forest School of Medicine; Improved Diagnosis of Primary  Hyperparathyroidism: Pragmatic Trial to Assess Parathyroid Glands on Routine CT
  • Farouk Dako, MD, MPH, Hospital of the University of Pennsylvania; Technology and Community Driven Lung Cancer Surveillance System (TCDCS)
  • Clare Poynton, MD, PhD, Boston Medical Center; Predicting Response To Neoadjuvant Therapy In Treatment-Naïve Breast Cancer Patients Using Multimodal Imaging Of The Tumor Micro-environment

2021

  • Jeffrey P. Guenette, MD, Brigham and Women’s Hospital;, Radiologist Recommendation Variance and Recommendation Fulfillment Inequities in Neck Imaging;
  • Eniola T. Oluyemi, MD, MPH, Johns Hopkins University, Evaluating The Use Of Geographic Tracing And Patient Navigation To Promote Timely Diagnostic Evaluation And Breast Cancer Diagnosis In Patient Populations Most Severely Impacted By The COVID-19 Pandemic

2020

  • Nathan M. Cross, MD, MS, University of Washington, Clinical Translation of Machine Learning-based Opportunistic Screening for Imaging Evidence of Osteoporosis
  • Natalia Gorelik, MD, McGill University,  Optimization of the Follow-Up Imaging Algorithm for Local Surveillance Following Extremity Soft Tissue Sarcoma Resection using Comparative Effectiveness Techniques
  • Randy C. Miles, MD, MPH, Harvard Medical School, Precision Medicine: External Validation and Clinical Assessment of an Artificial Intelligence (AI) Risk Prediction Model to Support Radiologist Interpretation
  • Kathleen Ruchalski, MD, David Geffen School of Medicine at UCLA, Integration of Imaging and Patient-reported Outcomes for Assessment of Time-to-Treatment Discontinuation in Patients with Advanced Non-small Cell Lung Cancer on Immunotherapy or Chemo-immunotherapy

2019

  • Hediyeh Baradaran, MD, University of Utah Health, Development and Assessment of a Standardized Reporting Mechanism for Carotid Plaque Characteristics
  • Resmi A. Charalel, MD, Weill Cornell Medical College/New York-Presbyterian Hospital, Early Liver Cancer: Understanding Outcomes through Treatment Received, Social Determinants and Access to Care
  • Stuart L. Cohen, MD, Northwell Health, Determining the Optimal Diagnostic Strategy for Pregnant Women with Suspicion of Pulmonary Embolism
  • Premal Trivedi, MD, MSE, University of Colorado - Anschutz Medical Center, Can We Bridge the Gap? Creating an Evidence-based Intervention for Reducing Racial Inequity in Survival Following Transjugular Intrahepatic Portosystemic Shunt (TIPS) for Variceal Bleeding

2018

  • Neena Kapoor, MD, Brighman & Women's Hospital: Recommendation of Additional Imaging Follow-Up: Identifying Factors and Reducing Unwarranted Variation
  • Kathryn Lowry, MD, University of Washington: Tailoring Magnetic Resonance Imaging (MRI) Surveillance in Breast Cancer Survivors to Patient-Specific Risks
  • Gelareh Sadigh, MD, Emory University: Patient-Reported Financial Toxicity in Multiple Sclerosis: Predictors and Association with Neuroimaging and Medication Non-Adherence

2017

  • Matthew Bucknor, MD, University of California, San Francisco: Cost-Effectiveness Analysis and Novel Outcomes Assessment of Magnetic Resonance-Guided Focused Ultrasound Ablation of Bone Metastases
  • Dorothy A. Sippo, MD, MPH, Massachusetts General Hospital: Development and Assessment of an Automated Outcomes Feedback Application to Optimize Radiologist Performance using Digital Tomosynthesis with Mammography
  • Tina Tailor, MD, Duke University Medical Center: Access to Screening Facilities for U.S. Populations at Risk for Lung Cancer: A Geospatial Analysis of Access to CT Facilities for Individuals Eligible for Lung Cancer Screening

2016

  • Paggie Kim, MD, Assistant Professor, Loma Linda University, Cerebral Deoxyhemoglobin Imaging: A Biomarker for Poor Neurological Outcomes in Neonates with Acute Hypoxic Ischemic Brain Injury (HI-BI)
  • Matthew P. Lungren, MD, MPH, Assistant Professor, Stanford University School of Medicine, Use of Predictive Modeling and Machine Learning to Develop Clinical Decision Support for Pulmonary Embolism CT Imaging in Children

2015

  • Falgun H. Chokshi, MD, MS, Assistant Professor, Emory University School of Medicine, The Value of Vertebral Augmentation for Treatment of Spinal Fractures in Multiple Myeloma Related Bone Disease: A Population Based Study Using the SEER-Medicare Linked Database
  • Lars Grimm, MD, MHS, Clinical Instructor, Duke University Medical Center, Development of a Personalized Evidence Based Algorithm for the Management of Suspicious Mammographic Calcifications
  • Mahmud Mossa-Basha, MD, Assistant Professor, University of Washington, Diffusion Tensor Imaging of the Cervical Spine as a Prognostic Tool for Acute Spinal Cord Injury
  • Sapna Rawal, MD, Assistant Professor, University Health Network-Toronto Western Hospital, Impact of Timing of Aneurysm Treatment on Clinical Outcome in Subarachnoid Hemorrhage (SAH)

2014

  • Richard G. Abramson, MD, Assistant Professor, Vanderbilt University Medical Center, Technology Assessment of Multi-parametric MRI as an Early Cancer Treatment Response Biomarker
  • Shadpour Demehri, MD, Assisstant Professor, Johns Hopkins University, Diagnostic Performance, Therapeutic Impact, and Cost-effectiveness of Advanced Imaging Paradigms in Patients with Chronic Wrist Pain
  • Adam Talenfeld, MD, Assistant Professor, Weill Cornell Medical College/New York-Presbyterian Hospital, Resect, Ablate or Observe? - SEER-Medicare and Cost-effectiveness Analyses of Small Renal Mass Treatment Strategies for Older Patients
  • Heidi R. Umphrey, MD, Assistant Professor, The University of Alabama at Birmingham, Pilot Study of Dual-energy (DE) Contrast-enhanced (CE) Digital Mammography to Detect Breast Cancer in Patients with Increased Breast Density (BI-RADS Category 3 or 4)

2013

  • Tessa S. Cook, MD, PhD, Fellow, Hospital of the University of Pennsylvania, TB or Not TB: The Cost-Effectiveness of Chest Radiographs vs. Serum IGRAs in Healthcare Workers with a Positive Tuberculin Skin Test for the Detection of Tuberculosis
  • Stella K. Kang, MD, Fellow, NYU Langone Medical Center, Advanced MRI for Triaging Renal Mass Management: A Patient-Centered Approach
  • Katherine E. Maturen, MD, Assistant Professor, University of Michigan Hospitals, What Are We Missing? Diagnosing Uterine Adenomyosis Using Ultrasound Elastography
  • Robert C. Orth, MD, PhD, Assistant Professor, Texas Children’s Hospital, Clinical Effectiveness and Cost-Effectiveness Analysis of Imaging Children with a First Febrile Urinary Tract Infection

2012

  • Ajay Gupta, MD, Assistant Professor, New York Presbyterian Hospital/Weill Cornell Medical College, Evaluation of Cerebrovascular Reserve in Carotid Steno-occlusive Disease as a Prognostic Imaging Biomarker for Future Stroke or TIA Using Arterial Spin Labeling MRI Perfusion
  • Katherine M.Krajewski, MD, Instructor in Radiology, Brigham & Women's Hospital, Development of an Imaging-based Algorithm to Guide Therapeutic Decision Making in VEGF-targeted Treatment of Advanced Renal Cell Carcinoma
  • Christoph I. Lee, MD, MSHS, Assistant Professor, Seattle Cancer Care Alliance, Cost-Effectiveness Analysis of Breast Tomosynthesis as an Adjunct Screening Tool for Women with Dense Breasts
  • Daniel M. Mandell, MD, Assistant Professor, Toronto Western Hospital, Identifying High-risk Patients with Asymptomatic Carotid Artery Stenosis Using BOLD MR Measurement of Cerebrovascular Reserve

2011

  • Arun Krishnaraj, MD, MPH, Fellow, Massachusetts General Hospital, The Impact of Advanced Electronic Health Records Systems in Radiology: A Prospective Assessment of Technology Implementation and Clinical Outcomes”
  • Meghan G. Lubner, MD, Assistant Professor, University of Wisconsin School of Medicine and Public Health, Volumetric Tumor Measurement for Assessing Treatment Response: Too Good to RECIST?
  • Jadranka Stojanovska, MD, MS, Assistant Professor, University of Michigan Health System, Patient and Physician Centered Radiology
  • Elysa Widjaja, MD, MBBS, Assistant Professor, Hospital for Sick Children, Quantitative Neuroimaging Markers of Executive Dysfunction in Children with Frontal Lobe Epilepsy

2010

  • Avneesh Chhabra, MD, Assistant Professor of Radiology and Orthopedic Surgery, Johns Hopkins Medical Institutions, High Resolution MR Neurography in a Prospective Cohort of Patients with Injured Peripheral Nerves Treated with Surgery
  • Ritu R.Gill, MBBS, Instructor in Radiology, Brigham and Women's Hospital, Genomic Profiling of Non-Small Cell Lung Cancer (NSCLC) for Personalized Targeted Therapy Using CT-guided Transthoraic Needle Biopsy (TTNB): Technological Assessment and Clinical Outcomes
  • Christopher P. Hess, MD, PhD, Assistant Professor of Radiology, University of California, San Francisco, Impact of Automated Brain MR Imaging Analysis on Radiologic Interpretation in Patients with Dementia: What is the Added?
  • Jenny K. Hoang, MBBS, Assistant Professor of Radiology, Duke University Medical Center, Functional Imaging with FDG PET and MR Imaging during Chemoradiation of Locally Advanced Head and Neck Cancer: Do Early Intratreatment Changes Predict Treatment Outcome?

2009

  • James Fink, MD, Assistant Professor, University of Washington, Distinguishing Recurrent High-Grade Glioma from Post-radiation Change: Can Advanced MRI Techniques Predict Outcome?
  • Prachi Agarwal, MD, Assistant Professor, University of Michigan, IPremature Coronary Artery Disease (CAD) in Severe Psoriasis
  • Rathan Subramaniam, MD, Assistant Professor, Boston Medical Center, Randomized, Prospective Study of FDG PET/CT Surveillance versus Planned Nech Dissection in Management of Patients After Successful Chemorad otherapy for Advanced Head and Neck Squamous Cell Cancer.
  • Saurabh Jha, Assistant Professor, University of Pennsylvania School of Medicine, The Use of Stress Cardiac MRI as the Initial Imaging Modality for Intermediate Risk Patients with Stable Symptoms Suspicious for Coronary Artery Disease – Is it more Cost-Effective than Myocardial Perfusion Imaging and Stress Echocardiography?

2008

  • Laura Fayad, MD, John's Hopkins University, Molecular Characterization of Musculoskeletal Tumors by Proton MR Spectroscopy
  • Eva Gombas, MD, Brigham & Women's, Technologic Assessment and Correlation between Molecular Classification of Breast Cancer and Breast MR Imaging and MR Spectroscopy at 3T
  • Rajan Jain, MD, Henry Ford Health System, Perfusion CT Imaging of brain Tumors: In-vivo Evaluation of Heterogeneity of Tumor Angiogenesis using Correlation of Perfusion CT Parameters with Histological Angiogenesis Markers
  • Esther Yuh, MD, University of California, San Francisco, Computer-Aided Evaluation of Trauma Head CT

2007

  • Paul Cronin, MD, Assistant Professor of Radiology, University of Michigan, Ann Arbor, MI – Reducing Cardiovascular Risk: Tailored Patient Education Using Screening CT for Coronary Artery Disease in a Teachable Moment
  • Marta Heilbrun, MD, Instructor in Radiology, University of Utah, Salt Lake City, UT – Cost-effectiveness Analysis of Percutaneous Biopsy in the Diagnostic Work-up of the Small Solid Renal Mass
  • Nabile Safdar, MD, Assistant Professor, University of Maryland, Baltimore, MD – Creating a Framework for Analyzing 'Hidden' Variables in Imaging Research, with a Case Study Assessing the Effect of Extended Work Hours on Task Vigilance
  • Hanna Zafar, MD, Assistant Professor, University of Pennsylvania, Philadelphia, PA – Utilization and Therapeutic Efficacy of FDG-PT in the Evaluation of Patients with Colorectal Cancer following Curative Resection

2006

  • Wendy DeMartini, MD, Assistant Professor of Radiology, University of Washington, Seattle, WA - Development and Application of a Predictive Model for Breast Carcinoma Using MRI Features and Patient Characteristics
  • Edward Lee, MD, Instructor in Radiology, Children's Hospital, Boston, MA - Evaluation of Hyperpolarized 3He MRI in Pediatric Patients with Asthma: Assessment of Technology and Functional Ventilatory Status
  • Cynthia Santillan, MD, Assistant Professor, University of California, San Diego, CA - Cost-Effectiveness of Screening for Hepatocellular Carcinoma in Cirrhotic Patients
  • Jingbo Zhang, MD, Assistant Professor, Sloan-Kettering Institute for Cancer Research, New York, NY - Multiparametric Prostate MR at 3T: Impact on Pretreatment Evaluation of Clinically Localized Prostate Cancer

2005

  • Fiona Fennessy, MD, Instructor in Radiology, Brigham & Women's Hospital, Boston, MA - Magnetic Resonance-guided Focused Ultrasound Surgical Treatment of Uterine Leiomyomas: Assessment of an Emerging Technology
  • Aine Kelly, MD, Lecturer II, University of Michigan, Ann Arbor, MI - Cost-Effectiveness and Utility of Coronary Artery Computed Tomography Angiography (CTA) in Screening for Coronary Artery Disease
  • Geetika Khanna, MD, Assistant Professor, University of Iowa, Iowa City, IA - 111In-DTPA-Pentrtreotide Imaging for Diagnosis and Post-therapy Surveillance of Pediatric Central Nervous System Tumors
  • Janie Lee, MD, Research Scientist, Beth Israel Deaconess Medical Center, New York, NY - Cost-Effectiveness of Breast Cancer Surveillance in BRCA Gene Mutation Carriers

2004

  • Orit A. Glenn, MD, Assistant Professor of Radiology, University of California, San Francisco - Evaluating The Diagnostic Potential And Clinical Usefulness Of Fetal Magnetic Resonance Neuroimaging (Research awarded NIH grant after year 1 - GERRAF award forfeited)
  • J. Paul Jacobson, MD, Clinical Instructor, Neuroradiology, Loma Linda University - Minimally Invasive Treatment Of Painful Osteoporotic Vertebral Compression Fractures: A Trial To Compare Outcomes In Patients Undergoing Kyphoplasty Versus Vertebroplasty
  • Pina C. Sanelli, MD, Assistant Professor of Radiology, Weill Medical College of Cornell University, New York Presbyterian Hospital - CT Perfusion Used to Evaluate Vasospasm Following Aneurysmal Subarachnoid Hemorrhage

2003

  • Elizabeth S. Burnside, MD, MPH, MS, Assistant Professor of Radiology and Chief, Breast Imaging, University of Wisconsin - An Expert System to Determine the Probability of Breast Cancer and Provide Real-time Decision Support for Mammography
  • John A. Carrino, MD, MPH, Assistant Professor of Radiology, Harvard Medical School, and Staff Radiologist, Brigham and Women's Hospital - The Development, Testing and Implementation of a Prediction Rule for Distinguishing Between Benign and Malignant Vertebral Compression Fractures of the Spine by Magnetic Resonance Imaging Feature Analysis
  • Mukesh G. Harisinghani, MD, Instructor in Radiology, Harvard Medical School, and Assistant Radiologist, Massachusetts General Hospital - Detection of Minimal Metastatic Disease in Lymph Nodes of Patients with Prostate Carcinoma
  • Martina M. Morrin, MD, Assistant Professor of Radiology, Harvard Medical School, and Staff Radiologist, Beth Israel Deaconess Medical Center - MR Colonography at 3 Tesla Using Air as Endoluminal Contrast Agent: Impact on Colorectal Polyp Detection

2002

  • Jonathan H. Burdette, MD, Assistant Professor of Radiology, Wake Forest University - Using fMRI to Evaluate Sensory Processing in Dyslexia
  • Annette J. Johnson, MD, Assistant Professor of Radiology, Indiana University - Radiology Report Quality: A Cohort Study of Point-and-Click Structured Reporting versus Conventional Dictation
  • Valerie L. Ward, MD, Lecturer in Radiology, The Children's Hospital-Boston - An Assessment of Magnetic Resonance Imaging in the Prenatal Diagnosis of Fetal Chest Masses: Impact on Diagnostic Accuracy, Clinical Decision Making, Parental Understanding and Prediction of Neonatal Respiratory Health Outcomes

2001

  • Ruth C. Carlos, MD, Lecturer in Radiology, University of Michigan - What's It Worth to You? The Added Value of Diagnostic Testing for Evaluating Post-menopausal Bleeding
  • Stephanie K. Carlson, MD, Assistant Professor of Radiology, Mayo Medical School - Clinical Efficacy of a Breath-hold Monitoring and Feedback System for Computed Tomography Fluoroscopy-guided Biopsy of the Chest or Upper Abdomen: Technology Assessment and Outcomes Analysis
  • Christopher L. Sistrom, MD, Assistant Professor of Radiology, University of Florida - Free Text Versus Structured Format for Radiology Reports: Measuring Performance and Preference of Selected Medical Personnel in Extracting Case Specific Information
  • Karen A. Tong, MD, Assistant Professor of Radiology, Loma Linda University Medical Center - Comparison of a New High-resolution Blood-sensitive Magnetic Resonance Imaging Technique with Magnetic Resonance Spectroscopy in Predicting Outcome in Adults Experiencing Severe Traumatic Brain Injury

2000

  • Yoshimi Anzai, MD, University of Michigan/University of Washington: Impact of Sinus CT on the Management and Clinical Outcome of Patients with Sinusitis
  • Huy M. Do, MD, Stanford University: Clinical Outcomes of Percutaneous Vertebroplasty for Patients with Osteoporotic Vertebral Body Compression Fractures
  • Michael E. Zalis, MD, Massachusetts General Hospital: Colon Cancer Screening Enhanced by Imaging Processing: Prospective Evaluation of Digital Bowel Subtraction and Automated Polyp Detection in CT Colonography

1999

  • Daniel N.D. Heller, MD, MS, University of California San Francisco - Mt. Zion Medical Center: The Development of an Adaptable and User-friendly Modeling Environment for Conducting and Interpreting Cost-effectiveness Analysis of Imaging Strategies
  • Ramin Khorasani, MD, Harvard University - Brigham and Women's Hospital: The Effect of Real-time Application of Medical Management Tools on Radiology Test Ordering Behavior by Physicians
  • L. Santiago Medina, MD, MPH, Children's Hospital Medical Center-Cincinnati: The Role and Cost-effectiveness of Imaging in Newborns with Suspected Occult Spinal Dysraphism
  • Katie D. Vo, MD, Washington University: Interventions to Improve Physician Performance in Interpreting Cranial Computed Tomography Scans of Acute Ischemic Stroke Patients

1998

  • C. Craig Blackmore, MD, MPH, Cost-effectiveness Analysis of Radiographic Screening of the Cervical Spine in Low Risk Trauma Patients
  • John Eng, MD, Quality Evaluation of Radiographic Interpretation in the Emergency Department: A Validation Study of Standardized Case Sets
  • Richard B. Gunderman, MD, PhD, The Quality of Reporting in Pediatric Radiology

1997

  • Elizabeth G. McFarland, MD, Colonic Polyp Detection with Spiral CT Colonography: Validation and Prospective Evaluation of CT, Barium Enema and Endoscopy
  • Max P. Rosenm, MD, The Efficacy of Diagnostic Thinking Following a Ventilation/Perfusion Lung Scan - A Threshold Approach
  • Dulcy E. Wolverton, MD, Computer-Aided Diagnosis in Mammography and Its Effect on Radiologist Performance
  • Kyle K. Yu, MD, Prediction of Progression-Free Survival in Patients with Prostate Cancer: Comparison of MR Imaging with Spectroscopy, Transrectal Ultrasound with Doppler, Sextant Biopsies, and Multivariate Prediction - A Prospective Study

1996

  • J. Jeffrey Carr, MD, MPH, Application of Telemedicine to Screening Mammography: A Pilot Study to Evaluate Feasibility
  • Stephen Chan, MD, Prospective Evaluation of the Therapeutic Efficacy of High-resolution MRI in Presurgical Evaluation of Temporal Lobe Epilepsy
  • Caroline Reinhold, MD, FRCPC, MR Cholangiopancreatography Versus Endoscopic Retrograde Cholangiopancreatography in the Diagnosis of Bile Duct Obstruction

1995

  • Jeffrey G. Jarvik, MD, Comparison of Outcomes and Cost Effectiveness of Rapid MR Screening with Plain Film Radiography of the Lumbar Spine in Patients with Low Back Pain
  • Geoffrey D. Rubin, MD, Prospective Assessment of CT Angiography, MR Angiography and Conventional Angiography for Improved Accuracy of Surgical Planning for the Treatment of Abdominal Aortic Aneurysms
  • Ella A. Kazerooni, MD, Impact of Radiology Practice Guidelines on the Utilization of Diagnostic Imaging Examinations and Patient Outcome
  • Peter E. Shile, MD, Reader Characterization of Benign and Malignant Lesions in Mammography: An Assessment of Spatial Resolution in Digital Mammography and an Evaluation of the ACR BI-RADS Lexicon
  • J. Shannon Swan, MD, MR Angiography of Aorto-iliac Peripheral Vascular Disease: Diagnostic Accuracy, Decision-making, and Patient Preference Analysis

1994

  • Elizabeth A. Drucker, MD, JD, Investigation of Helical CT Scanning of the Pulmonary Arteries in Diagnosis of Acute Pulmonary Embolism
  • Ethan J. Halpern, MD, A Comparative Study of Doppler Ultrasound, CT Angiography and MR Angiography for the Non-invasive Evaluation of Renal Artery Stenosis
  • Clare M.C. Tempany, MD, A Computer-based Method for Evaluation of Interobserver Variability in CT and MRI

1993

  • Susan Brothers Peterman, MD, Emory University: MRA/US Carotid Stenosis Screening Study
  • Thomas K.P. Egglin, MD, Yale University: Technology Assessment of Magnetic Resonance Imaging
  • Curtis P. Langlotz, MD, PhD, University of Pennsylvania: Computer-based Dissemination of Cost-effectiveness Guidelines

1992

  • Thomas E. Grist, MD, Magnetic Resonance Angiography in the Diagnosis of Renovascular Disease
  • Laurie L. Fajardo, MD, Assessment of a New Technology for Performing Stereotactic Needle Biopsy of Nonpalpable Breast Lesions
  • Maria G.M. Hunink, MD, PhD, The Diagnostic Work-up of Peripheral Arterial Disease
  • Janet E. Kuhlman, MD, Johns Hopkins University: Determination of Hepatic Resectability: A Comparison of CTAP Versus Contrast Enhanced MRI. Do Differences in Test Accuracy Impact