Tri-City PETCT


Hi, we are Tri-City PETCT at Vista.
We are leaders in diagnostic imaging.

We have provided PET/CT services to San Diego County since 1999. Our warm and caring team members are happy to answer any questions you may have about your exam and will guide you through your scan to its completion in a supportive and comforting environment.

We are accredited by the American College of Radiology. Our technologists are certified by the American Registry of Radiologic Technologists. As an Alliance HealthCare Radiology business, we are backed by the largest provider of outpatient diagnostic imaging services in the U.S.


Our Team


Stephen P. Schmitter, M.D., Director of PET Imaging

Dr. Schmitter specializes in diagnostic radiology and nuclear medicine. He is board-certified in diagnostic radiology with the American Board of Radiology and the American Board of Nuclear Medicine. In addition to being the Director of PET Imaging at Tri-City PETCT and San Diego Imaging Escondido, he is also on staff at Palomar Medical Center, Pomerado Hospital and Tri-City Medical Center. Dr. Schmitter is a member of the San Diego Imaging Medical Group.

Bruce J. Biederman
Medical School: George Washington University
Residency: Diagnostic Radiology
Focus: Coronary CTA, Neuroradiology
Kathleen M. Flores
Medical School: University of Maryland
Residency: Diagnostic Radiology
Focus: Musculoskeletal Imaging

David G. Evans
Medical School: University of Texas, Southwestern Medical School
Residency: Internal Medicine, Nuclear Medicine
Focus: Nuclear Medicine, Positron Emission Tomography
Gregory K. Nicpon
Medical School: New York Medical College
Residency: Diagnostic Radiology
Focus: Body and Musculoskeletal Imaging, Non-invasive Angiography

Want to join our team?

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We care about patient satisfaction.

Patient satisfaction is our number one priority. Learn more about our services today.

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Providing state-of-the-art diagnostic imaging services to patients throughout San Diego County since 1999.