Keith A Tonkin, MD
Keith A Tonkin, MDRadiology Residency Program Director

Program Director Facts

Medical Degree University of Tennessee Health Science Center
Internship Methodist Hospital, University of Tennessee
Residency Baptist Memorial Hospital-Memphis
Fellowship University of California at Los Angeles (diagnostic cardiovascular)
Board Certification Diagnostic Radiology
Special Interests Cardiac and pulmonary imaging, MRA and CTA

Radiology Program Faculty

Adam S. Arthur, M.D., M.P.H.
Adam S. Arthur, M.D., M.P.H.
Medical Degree University of Virginia School of Medicine
Internship University of Utah
Residency University of Utah
Fellowship Semmes-Murphey Neurologic & Spine Clinic (Interventional Neuroradiology & Cerebrovascular Surgery)
Daniel J. Becker, M.D.
Daniel J. Becker, M.D.
Medical Degree University of Tennessee College of Medicine
Internship Oschner Foundation Hospital
Residency Baptist Memorial Hospital-Memphis
Diplomate Endovascular Medicine, American Board of Vascular Medicine
Board Certification Diagnostic Radiology
Andy Craven, MD
Andy Craven, MD
Medical Degree University of Alabama School of Medicine
Internship Physician’s Medical Center Carraway, Birmingham, AL
Residency Baptist Memorial Hospital-Memphis
Fellowship Mallinckrodt Institute of Radiology at Washington University in St. Louis, MO (Nuclear Medicine)

Henry Dalsania, MD
Henry Dalsania, MD
Medical Degree St. Louis University School of Medicine
Internship Chicago, IL
Residency Hahnemann University Hospital in Philadelphia, PA
Fellowship Mallinckrodt Institute of Radiology at Washington University in St. Louis, MO (vascular and interventional radiology)
Board Certification Diagnostic Radiology, CAQ – Vascular and Interventional Radiology
Scott D. Didier, MD
Scott D. Didier, MD
Medical Degree Louisiana State University Health Sciences Center
Residency Baptist Memorial Hospital-Memphis
Fellowship University of Alabama-Birmingham (Neuroradiology)
Board Certification Diagnostic Radiology, CAQ-Neuroradiology
Alan D Eisenberg, MD
Alan D Eisenberg, MD
Medical Degree Rutgers Medical School
Residency Vanderbilt University Medical Center
Fellowship University of California, San Francisco (Neuroradiology)
Board Certification Diagnostic Radiology, CAQ-Neuroradiology
Andy Ellzey, MD
Andy Ellzey, MD
Medical Degree University of Tennessee College of Medicine
Internship University of Tennessee College of Medicine (General Surgery)
Residency Baptist Memorial Hospital-Memphis
Fellowship University of California-San Diego (Musculoskeletal Radiology)
Board Certification Diagnostic Radiology
George W Gallimore, MD
George W Gallimore, MD
Medical Degree University of Tennessee College of Medicine
Residency University of Tennessee College of Medicine
Fellowship Baylor University Medical Center (MRI)
Board Certification Diagnostic Radiology
Dewey D Garner, MD
Dewey D Garner, MD
Medical Degree University of Mississippi School of Medicine
Residency University of Arkansas for Medical Sciences
Board Certification Diagnostic Radiology

Shannon M Gulla, MD
Shannon M Gulla, MD
Medical Degree University of Tennessee Health Science Center
Internship University of Tennessee, Memphis
Residency Baptist Memorial Hospital-Memphis
Fellowship Wake Forest University Baptist Hospital (Cardiothoracic Imaging)
Randy J Horras, MD
Randy J Horras, MD
Medical Degree University of Arkansas for Medical Sciences
Internship University of Alabama-Birmingham, Montgomery Internal Medicine Residency Program
Residency Baptist Memorial Hospital-Memphis
Fellowship University of Arkansas for Medical Sciences
Board Certification Diagnostic Radiology
Paxton Jones, MD
Paxton Jones, MD
Medical Degree University of Mississippi Medical Center
Residency Baptist Radiology Residency Program
Fellowship University of Alabama – Birmingham (Interventional Radiology)

Joe R Krisle, MD, FACR
Joe R Krisle, MD, FACR
Medical Degree University of Tennessee College of Medicine
Internship Baptist Memorial Hospital-Memphis
Residency Baptist Memorial Hospital-Memphis
Board Certification Diagnostic Radiology
Errol Lewis, MD
Errol Lewis, MD
Medical Degree Witwatersrand University
Internship Baragwanath Hospital, Witwatersrand University
Residency Pediatric-Hershey Medical Center; Radiology-Temple University Hospital
Fellowship Thomas Jefferson University Hospital (Ultrasound and CT)
Board Certification Diagnostic Radiology
Craig L Lipman, MD
Craig L Lipman, MD
Medical Degree Medical College of Georgia, Augusta
Residency Diagnostic Radiology-MetroHealth Medical Center & SUNY, Buffalo; Nuclear Medicine-SUNY, Buffalo; Internal Medicine -Sisters of Charity Hospital, Buffalo
Fellowship Emory University Health Care System (Nuclear Medicine)
Board Certification Diagnostic Radiology, Nuclear Medicine
Special Competence Nuclear Radiology, Nuclear Cardiology (CCNC)

James E. Machin, M.D.
James E. Machin, M.D.
Medical Degree Indiana University School of Medicine
Residency University of Louisville
Fellowship Vanderbilt University (Diagnostic Ultrasound)
Board Certification Diagnostic Radiology
H Lynn Magill, MD, FACR, FACNP
H Lynn Magill, MD, FACR, FACNP

Special InterestRenal, Cardiac, Pediatric and PET Imaging

Medical Degree Northwestern University
Internship Michael Reese Hospital Residency: Wilford Hall USAF Medical Center
Fellowship Washington University-Mallinckrodt Institute of Radiology (Pediatric Radiology)
Board Certification Diagnostic Radiology
Special Competence Nuclear Radiology, Nuclear Cardiology (CCNC)
Alan J McLeod, MD
Alan J McLeod, MD
Medical Degree University of Kansas School of Medicine
Internship St. Luke’s Hospital-University of Missouri-Kansas City School of Medicine
Residency St. Luke’s Hospital-University of Missouri- Kansas City School of Medicine
Fellowship University of Texas -M.D. Anderson Cancer Center (Body Imaging)
Board Certification Diagnostic Radiology

S David Morris, MD
S David Morris, MD
Medical Degree East Tennessee State University College of Medicine
Internship East Tennessee State University College of Medicine
Residency Medical College of Georgia Hospital & Clinics
Fellowship Medical College of Georgia Hospital & Clinics (Neuroradiology), Baptist Memorial Hospital-Memphis (Interventional Neuroradiology)
Board Certification Diagnostic Radiology, CAQ-Neuroradiology
T Craig Nauert, MD
T Craig Nauert, MD
Medical Degree Baylor College of Medicine
Residency University of Texas, Houston
Fellowship M.D. Anderson Hospital & Tumor Institute (Neuroradiology, Head and Neck Radiology)
Board Certification Diagnostic Radiology, CAQ-Neuroradiology
Robert J Optican, MD
Robert J Optican, MD
Medical Degree Washington University School of Medicine
Internship St. John’s Mercy Medical Center
Residency Duke University Medical Center
Fellowship Cleveland Clinic Foundation (Cardiac Imaging)
Board Certification Diagnostic Radiology

Virginia S Owen, MD
Virginia S Owen, MD
Medical Degree Louisiana State University Medical Center
Internship Maryland General Hospital
Residency Louisiana State University Medical Center and Baptist Memorial Hospital-Memphis
Fellowship Baptist Memorial Hospital-Memphis (Nuclear Medicine/MRI)
Board Certification Diagnostic Radiology
Special Competence Nuclear Medicine
Ranganathan Parthasarathy, MD
Ranganathan Parthasarathy, MD
Medical Degree SUNY at Buffalo, School of Medicine
Residency SUNY at Buffalo, School of Medicine
Fellowship University of Rochester School of Medicine (Cross Sectional Imaging)
Board Certification Diagnostic Radiology, Nuclear Medicine
W Webster Riggs, Jr, MD, FACR
W Webster Riggs, Jr, MD, FACR
Medical Degree University of Tennessee
Internship Baptist Hospital, Nashville
Residency Boston Children’s Hospital, Methodist Hospital, Memphis
Board Certification Diagnostic Radiology, CAQ-Pediatric Radiology

John Stanfill, MD
John Stanfill, MD
Medical Degree Saint Louis University, Saint Louis, Missouri
Residency Baptist Memorial Hospital, Memphis
Fellowship University of California – San Diego (Musculoskeletal Radiology)
Board Certification Diagnostic Radiology
Special Interests Musculoskeletal Radiology
Paul R Tanner, MD
Paul R Tanner, MD
Medical Degree Meharry Medical College, Nashville
Residency Baptist Memorial Hospital-Memphis
Board Certification Diagnostic Radiology
Lloyd R Thomas, Jr, MD, FACR
Lloyd R Thomas, Jr, MD, FACR
Medical Degree University of Tennessee School of Medicine
Internship Baptist Memorial Hospital-Memphis
Residency Baptist Memorial Hospital-Memphis
Board Certification Diagnostic Radiology

Allen K Tonkin, MD
Allen K Tonkin, MD
Medical Degree University of Louisville School of Medicine
Internship University of Florida, Shands Teaching Hospital
Residency University of Florida, Shands Teaching Hospital
Fellowship University of Florida, Shands Teaching Hospital (Nuclear Medicine)
Board Certification Diagnostic Radiology
Dexter H Witte, MD
Dexter H Witte, MD
Medical Degree University of Tennessee Center for Health Sciences
Internship Methodist Hospital, Memphis
Residency Baptist Memorial Hospital-Memphis
Fellowship University of California-San Diego (Musculoskeletal Radiology)
Board Certification Diagnostic Radiology
Phillip T Zeni, Jr, MD
Phillip T Zeni, Jr, MD
Medical Degree University of Arkansas for Medical Sciences
Residency University of Arkansas for Medical Sciences
Fellowship University of Arkansas (Vascular Interventional Radiology)
Board Certification Diagnostic Radiology, CAQ-Vascular & Interventional Radiology