Martin G. Pomper, MD, PhD



Dr. Martin Pomper is a Professor in the Johns Hopkins Medicine Department of Radiology and Radiological Science, as well as the Director of the Division of Nuclear Medicine and Molecular Imaging. He is also a Professor of Oncology and Radiation Oncology and Molecular Radiation Services. He is an internationally recognized leader in molecular imaging research and develops and implements new imaging agents that target cancer and brain disorders.  

Dr. Pomper’s interests are in the development of new radiopharmaceuticals, optical probes and techniques for molecular imaging of cancer and central nervous system disease. One area of focus is on imaging prostate cancer and the development of imaging and therapeutic agents targeting the prostate-specific membrane antigen (PSMA). He has numerous patents related to medical imaging, many of which have been licensed, as well as several imaging agents in clinical trials.   

He is the immediate past President of the Society of Nuclear Medicines Molecular Imaging Center of Excellence and Editor-in-Chief of the Journal Molecular Imaging.

Dr. Pomper was elected to the National Academy of Medicine in 2017. 

Sridhar Nimmagadda

Sridhar Nimmagadda, PhD


Dr. Sridhar Nimmagadda is an Associate Professor in the Johns Hopkins Medicine Department of Radiology and Radiological Science, Department of Oncology and Department of Medicine and a member of the Johns Hopkins Kimmel Cancer Center. He specializes in neuroradiology and molecular imaging.


Dr. Nimmagadda received a B.S. in mathematics, physics and chemistry, and an M.S. in physical chemistry from Andhra University in India. He completed an additional M.S. in bioorganic chemistry at the Indian Institute of Technology, and in 2005 he received a Ph.D. in cancer biology from Wayne State University in Detroit, Michigan. After a postdoctoral fellowship in molecular imaging at the Johns Hopkins University School of Medicine, he joined the Johns Hopkins faculty as an Assistant Professor in 2009.


Dr. Nimmagadda has won numerous awards and grants for his research, has authored more than 50 journal articles, and is the Associate Editor of Frontiers in Cancer Imaging and Diagnosis.

Ron C. Mease, PhD


Dr. Mease, Ph.D., is an Associate Professor in the Johns Hopkins Medicine Department of Radiology and Radiological Science and the Department of Oncology and a member of the Johns Hopkins Kimmel Cancer Center.

A researcher, Dr. Mease is an organic chemist who specializes in radiopharmaceutical design, synthesis, and development for imaging or radiotherapy—specifically, their applications in treating cancer—with much of his research focused on prostate cancer.

Prior to joining Johns Hopkins in 2003, Dr. Mease was a Research Professor of Radiology at The George Washington University and the University of Maryland at Baltimore. He also worked as a scientist in Brookhaven National Laboratory’s Medical Department.

Ravindra DeSilva Headshot

Ravindra Ajith DeSilva, PhD



Dr. De Silva oversees CTMI’s process development, quality control and production. He has more than 5 years of radiopharmaceutical industrial experience taking hands-on technical leadership and project management role on programs which included but not limited to transfer of existing manufacturing processes from third parties, drug development and manufacturing, formulation development, analytical development and translate early discoveries into clinical use in compliance with cGMP, FDA and other international regulations. 

Before joining Johns Hopkins faculty, he worked an assistant lab-director at C-TRIC GMP facility University of Colorado Denver, where he was responsible for  day-to-day operations of all clinical development and manufacturing of radiopharmaceuticals for clinical trials.

Dr. De Silva is a SNMMI award winner for developing novel radiotracer for PET imaging and he holds a Ph.D. in Organic Chemistry from Wayne State University, USA and Ms.C. in Inorganic Chemistry from National University of Singapore.  

Rehab AbdAllah, MB BCh


 Rehab AbdAllah is the Senior Administrative Manager for the Division of Nuclear Medicine and Molecular Imaging.  She is a regulatory specialist and contract initiation specialist.  She also ensures smooth and timely workflow, focusing on matters regarding the Johns Hopkins Institutional Review Board and the US Food and Drug Administration.