Rick Wray, M.D.

Rick Arthur Wray, M.D.


Radiology - Nuclear Medicine


Nuclear Cardiology

Machine Learning




  • Assistant Professor
  • Lead UC Davis Health Machine Learning Workgroup
To see if Rick Arthur Wray is accepting new patients, or for assistance finding a UC Davis doctor, please call 800-2-UCDAVIS (800-282-3284).

UC Davis Medical Center

2315 Stockton Blvd.
Sacramento, CA 95817
Driving Directions

Primary Phone:
800-2-UCDAVIS (800-282-3284)

Social Networking


Philosophy of Care

Dr. Wray's philosophy of care is patient first. He believes patient education, empowerment, and empathy are the key elements to achieve high-value care. In this personalized setting, he strives to incorporate technology and design thinking to define best practices. 

Clinical Interests

Dr. Wray is a molecular imaging specialist and nuclear medicine physician. He provides imaging consultation for oncology, cardiology and internal medicine as well as minimally invasive radioactive therapy for endocrinology and oncology. He has particular clinical interest and expertise in PET/CT.

Research/Academic Interests

Dr. Wray's research focuses on machine learning and radiomics in oncologic molecular imaging. Utilizing novel dynamic PET/CT quantitative imaging features and biomarkers he is creating large imaging databases combined with artificial intelligence to improve outcomes for cancer patients and provide personalized care.


Nuclear Medicine


M.D., New York Medical College, Valhalla NY 2008

B.S., Cornell University, Ithaca NY 2002


Nuclear Medicine, Mount Sinai/St. Luke's-Roosevelt Center, New York NY 2011-2014


Nuclear Medicine PET/CT, The Johns Hopkins Hospital, Baltimore MD 2014-2016

Board Certifications

American Board of Nuclear Medicine, 2014

Professional Memberships

American College of Radiology

American Medical Informatics Association

Radiological Society of North America

Society of Nuclear Medicine and Molecular Imaging

Select Recent Publications

Taghipour M, Wray R, Sheikhbahaei S, Wright JL, Subramaniam RM. FDG Avidity and Tumor Burden: Survival Outcomes for Patients With Recurrent Breast Cancer. AJR Am J Roentgenol. 2016 Apr, 206(4): 846-55.

Sheikhbahaei S, Wray R, Young B, Mena E, Taghipour M, Rahmim A, Subramaniam RM. 18F-FDG-PET/CT therapy assessment of locally advanced pancreatic adenocarcinoma: impact on management and utilization of quantitative parameters for patient survival prediction. Nucl Med Commun. 2016 Mar, 37(3): 231-8.

Sheikhbahaei S, Marcus C, Wray R, Rahmim A, Lodge MA, Subramaniam RM. Impact of point spread function reconstruction on quantitative 18F-FDGPET/CT imaging parameters and inter-reader reproducibility in solid tumors. Nucl Med Commun. 2016 Mar, 37(3): 288-96.

Sheikhbahaei S, Mena E, Marcus C, Wray R, Taghipour M, Subramaniam RM. 18F-FDG PET/CT: Therapy Response Assessment Interpretation (Hopkins Criteria) and Survival Outcomes in Lung Cancer Patients. J Nucl Med. 2016 Jun, 57(6): 855-60.

Taghipour M, Sheikhbahaei S, Wray R, Agrawal N, Richmon J, Kang H, Subramaniam RM. FDG PET/CT in Patients With Head and Neck Squamous Cell Carcinoma After Primary Surgical Resection With or Without Chemoradiation Therapy. AJR Am J Roentgenol. 2016 May, 206(5): 1093-100.

Wray R, Sheikhbahaei S, Marcus C, Zan E, Ferraro R, Rahmim A, Subramaniam RM. Therapy Response Assessment and Patient Outcomes in Head and Neck Squamous Cell Carcinoma: FDG PET Hopkins Criteria Versus Residual Neck Node Size and Morphologic Features. AJR Am J Roentgenol. Sep 2016, 207(3): 641-7.

Marcus C, Wray R, Taghipour M, Marashdeh W, Ahn SJ, Mena E, Subramaniam RM. JOURNAL CLUB: Value of Quantitative FDG PET/CT Volumetric Biomarkers in Recurrent Colorectal Cancer Patient Survival. AJR Am J Roentgenol. 2016 Aug, (2) 257-65.

Koizumi J, Itou C, Wray R, Myojin K, Hashimoto T, Nagata Y, Yamamuro H, Tsuji T, Ichikawa T, Shiraishi K, Kagawa T, Mine T, Watanabe N, Matsumae M, Janne d'Othée B. Partial splenic embolisation using n-butyl cyanoacrylate: intraprocedural evaluation by magnetic resonance imaging. Eur Radiol. 2013 May, 23(5): 1429-42.

DePuey EG, Ata P, Wray R, Friedman M. Very low-activity stress/high-activity rest, single-day myocardial perfusion SPECT with a conventional sodium iodide camera and wide beam reconstruction processing. J Nucl Cardiol. 2012, 19(5): 931-44.

DePuey G, Friedman M, Wray R, & Ata P. Unexpectedly low dose delivery enhancement with exercise and pharmacologic stress for myocardial perfusion SPECT. Journal of Nuclear Medicine 52, (supplement 1) 1113.