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R. Nick Bryan, MD, PhD, FACR

R. Nick Bryan, MD, PhD, FACR Physician

Emeritus Professor of Radiology

Dr. Bryan is a Penn Medicine employed physician.

About Dr. R. Nick Bryan

Recognized by Best Doctors in America 2003-2004, 2005-2006, 2007-2008, 2009-2010, 2011-2012, 2013-2014

Clinical Specialties


  • Radiology

Programs & Centers:

Board Certification:

  • Diagnostic Radiology, 1974
  • Neuroradiology, 1995

Description of Clinical Expertise


Practice Locations and Appointments

Insurance Accepted

  • Aetna US Healthcare
  • Cigna
  • Cigna HealthSpring
  • Devon Health Services (Americare)
  • Gateway Health Plan
  • Geisinger Health Plan
  • HealthAmerica / HealthAssurance, a Coventry Plan
  • HealthPartners
  • HealthPartners Medicare
  • HealthSmart
  • Highmark Blue Shield
  • Horizon Blue Cross Blue Shield of New Jersey
  • Humana / Choicecare
  • Independence Blue Cross (Keystone East)
  • Intergroup
  • Keystone First
  • Multiplan
  • NJ Medicaid
  • NJ Qualcare
  • Oxford Health Plan
  • PA Medicaid
  • PA Medicare
  • Preferred Care
  • Preferred Health Care/LGH
  • Rail Road Medicare / Palmetto GBA
  • Tricare
  • United Healthcare
  • UnitedHealthcare Community Plan
  • US Family Health Plan

Education and Training

Medical School: University of Texas
Residency: University of Texas Medical Branch at Galveston
Fellowship: University of Texas Medical Branch at Galveston
Fellowship: NewYork-Presbyterian/Columbia University Medical Center


American Association for the Advancement of Science, National American College of Radiology, National American Heart Association - Stroke Council, National American Society for Neuroscience, National American Society of Head & Neck Radiology, National American Society of Neuroradiology, National Association of University Radiologists, National European Radiology Association & Congress, International International Society of Magnetic Resonance in Medicine, International Pennsylvania Radiological Society, Local Radiologic Society of North America (RSNA), National Radiological Society of North America Research & Education Foundation, International Radiological Society of North America, International The College of Physicians of Philadelphia, Local World Federation of Neuroradiological Societies, International

Hospital Affiliation

Dr. Bryan is a Penn Medicine employed physician.

Hospital Privileges:

  • Hospital of the University of Pennsylvania: Has privileges to treat patients in the hospital.
  • Penn Presbyterian Medical Center: Has privileges to treat patients in the hospital.
  • Pennsylvania Hospital: Has privileges to treat patients in the hospital.


Description of Research Expertise:

Cerebral MRI findings and cognitive functioning; applications of perfusion MRI for neurological studies; development of spatially-oriented databases for digital brain images; nuclear magnetic resonance evaluation of stroke; physiologic imaging of human brain tumors.

Selected Publications:

Mohammad Salehi Sadaghiani, MD, MPH; Meng-Kang Hsieh, MS; Ilya Nasrallah, MD, PhD; Ragini Verma; PhD; Drew Parker, Sc.B; Guray Erus, PhD, Mohan Suyash; MD, Emmanuel Botzolakis, MD, PhD; R. Nick Bryan, MD, PhD: Brain white matter lesions; new insights in our understanding of leukoaraiosis ASNR 54th Annual Meeting : 2016.

E Botzolakis1, S Mohan1, I Nasrallah2, H Kundel1, E Herskovits3, R Bryan1: Development and Optimization of a Bayesian Expert System for Diagnosis Support in Neuroradiology ASNR 54th Annual Meeting : 2016.

I Nasrallah, M Hsieh, H Battapady, G Erus, L Launer, C Davatzikos, R Bryan: White matter lesion penumbra shows abnormalities on structural and functional MRI in CARDIA study ASNR 54th Annual Meeting : 2016.

A Al Yassin, M Salehi Sadaghiani, S Mohan, E Botzolakis, R Bryan, I Nasrallah: It's about time: A Time-Activity Study in Neuroradiology ASNR 54th Annual Meeting and Symposium : 2016.

Botzolakis E., Nasrallah, I., Kundel, H., Herskovits, E., Bryan, R., Mohan, S.: Validation of an Expert-based Bayesian Network for Discriminating Disease Affecting the Basal Ganglia and Thalamus ASNR 54th Annual Meeting : 2016.

S Mohan, EJ Botzolakis, I Nasrallah, E Herskovits, HL Kundel, RN Bryan: Bayesian Expert System for Clinical Diagnostic Decision Support in Neuroradiology AUR Program Committee : 2016.

RN Bryan: Streamlining an interactive Bayesian-based diagnostic support tool alongside traditional PACS system SPIE Medical Imaging : 2016.

Kurella Tamura M, Pajewski NM, Bryan RN, Weiner DE, Diamond M, Van Buren P, Taylor A, Beddhu S, Rosendorff C, Jahanian H, Zaharchuk G; SPRINT Study: Chronic kidney disease, cerebral blood flow and white matter volume in hypertensive adults Neurology : 2016.

RN Bryan: Brain and White Matter Hyperintensity Volumes After Ten Years of Random Assignment to Lifestyle Intervention Diabetes Care : 2016.

MS Sadaghiani, B Tunc, D Parker, R Wolf, RN, Bryan, Y Ghanbari, M Johnson, R Verma: Tract based analysis to assess plasticity after task oriented rehabilitation in stroke patients Stroke : 2016.

View all publications

Academic Contact Info

Department of Radiology
Perelman School of Medicine
3700 Hamilton Walk, Richards Building 7th Floor

Philadelphia, PA 19146
Phone: (215) 746-4062
Patient appointments: 800-789-PENN (7366)

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