Meet Our Team

Meet Our Team

At Total MRI, our staff, technicians, and radiologists have been carefully selected for their patient-friendly care and service. They go the extra mile every day to make sure every one of our patients has a positive experience. The team at Total MRI has over twenty years of experience that they will put to use during your MRI examination.


Dr. Mark David Herbst

Dr. Mark David Herbst, PH.D. has owned St. Petersburg Independent Diagnostic Radiology, Inc. since 1998 and graduated with his medical degree from Emory University in 1985. He has senior membership at the Radiology Society of North America and American Society of Neuroradiology. Dr. Herbst is a professor at Edward Via College of Osteopathic Medicine, helping Junior and Senior Med Students with their Radiology Rotations.

Dr. Sidney Friedman

Dr. Sidney Friedman graduated from New York University’s College of Medicine in 1975. He completed his residency at local Veterans Affairs Medical Center in West Los Angeles. With over forty years of experience serving patients, he has been double certified by the boards of Diagnostic Radiology and Nuclear Medicine. Dr. Friedman is one of the most well known radiologists in Los Angeles.

Dr. Ranon Udkoff

Dr. Udkoff graduated from the UC Irvine College of Medicine in 1984. Since then, he has gathered over 30 years of experience serving patients in Radiology.