Dr. Parker is an internationally recognized interventional radiologist and is well published in the areas of breast ultrasound, diagnosis and image-guided procedures. He was a founder and Director of both Opus Medical and Biopsys Medical, and currently serves as a consultant for several medical companies. Dr. Parker has written, edited and contributed to several books on percutaneous biopsy, and he is the author of numerous articles published in peer reviewed professional journals. Dr. Parker received his MD degree from the St. Louis University School of Medicine. He completed his residency at the Fitzsimons Army Medical Center in Aurora, Colorado, and fellowship at the University of Colorado.