Our Radiologists

Metro Imaging’s radiologists are specialized physicians who have earned a national reputation for providing outstanding service to patients and referring physicians. They have met the rigorous standards of major medical and residency training programs and are board certified by the American Board of Radiology. In addition, Metro Imaging's radiologists are:

  • Available to consult with referring physicians, both before and after exams, to discuss exam choices, protocols, findings and treatment options.
  • Onsite to monitor each exam as it is performed, eliminating unnecessary radiation and contrast.
  • Onsite to provide patients with the preliminary results of their imaging exams (OnSite Results) and are available to discuss these results.
  • Versed on technical issues and safety concerns, and follow HIPAA privacy and security rules, safeguarding patient confidentiality.
  • Published in peer-reviewed literature and have lectured at local and international meetings.

Harley Hammerman, MD

Chief Executive Officer, Metro Imaging

Dr. Harley J Hammerman, MD

Dr. Hammerman obtained his undergraduate and medical degrees at Washington University in St. Louis. He completed his radiology training at the Jewish Hospital of St. Louis and Washington University’s Mallinckrodt Institute of Radiology. He is board certified by the American Board of Radiology. He received specialty training in diagnostic radiology, magnetic resonance imaging, computed tomography, ultrasonography, mammography and interventional procedures.

Dr. Hammerman developed Metro Imaging’s OnSite Results program, which has received national recognition. He has written and lectured on the program, and is widely quoted.

Philip Trotta, MD

Medical Director, Metro Imaging South County

Dr. Philip C Trotta, MD

Dr. Trotta obtained his undergraduate degree at Case Western Reserve. He obtained his medical degree and completed his radiology training at St. Louis University, where he served as an instructor. He was chief of radiology at Naval Regional Medical Center in Newport, Rhode Island. He is board certified by the American Board of Radiology. He received specialty training in diagnostic radiology, magnetic resonance imaging, computed tomography, ultrasonography, mammography and interventional procedures.

Dr. Trotta is recognized throughout the St. Louis metropolitan area for his expertise in temporomandibular (TMJ) magnetic resonance imaging.

Karen Gladden, MD

Medical Director, Metro Imaging St. Peters

Dr. Karen H Gladden, MD

Dr. Gladden obtained her undergraduate degree at Old Dominion University. She obtained her medical degree and completed her radiology residency at Eastern Virginia Medical School. She completed her Neuroradiology Fellowship at Washington University’s Mallinckrodt Institute of Radiology.

Dr. Gladden is board certified by the American Board of Radiology and is board certified in Neuroradiology. She has had extensive training in mammography. She has also received specialty training in diagnostic radiology, magnetic resonance imaging, computed tomography, ultrasonography and interventional procedures.

Sirisha Jasti, MD

Medical Director, Metro Imaging West County

Dr. Sirisha Jasti, MD

Dr. Jasti obtained undergraduate training at Harvard University. She obtained her medical degree at the Stony Brook School of Medicine. She completed her radiology residency and musculoskeletal and neuroradiology fellowship training at the University of Rochester Medical Center.

In addition to her fellowship training, Dr. Jasti has had specialty training in diagnostic radiology, magnetic resonance imaging, computed tomography, ultrasonography, mammography and interventional procedures. She has presented numerous papers related to her musculoskeletal and neuroradiology fellowship training.

Albert Hammerman, MD

Medical Director, Metro Imaging Richmond Heights

Dr. Albert M Hammerman, MD

Dr. Hammerman obtained his undergraduate and medical degrees at Washington University in St. Louis. He completed his radiology training at the Jewish Hospital of St. Louis and Washington University’s Mallinckrodt Institute of Radiology, where he coauthored numerous publications. He is board certified by the American Board of Radiology. He received specialty training in diagnostic radiology, magnetic resonance imaging, computed tomography, ultrasonography, mammography and interventional procedures.

Dr. Hammerman is on the faculty of Washington University, where he teaches imaging anatomy.

Richard Koch, MD

Medical Director, Metro Imaging North County

Dr. Richard Alan Koch, MD

Dr. Koch obtained his undergraduate degree at Vanderbilt University and his medical degree at St. Louis University. He completed his radiology training at the University of Texas and Washington University’s Mallinckrodt Institute of Radiology.

Dr. Koch is board certified by the American Board of Radiology. He received specialty training in diagnostic radiology, magnetic resonance imaging, computed tomography, ultrasonography, mammography, interventional procedures and abdominal imaging.

Mark Hoffman, MD

Staff Radiologist, Metro Imaging

Dr. Mark J Hoffman, MD

Dr. Hoffman obtained his undergraduate degree at Washington University in St. Louis and his medical degree at St. Louis University. He completed his radiology training at the Jewish Hospital of St. Louis and Washington University’s Mallinckrodt Institute of Radiology.

Dr. Hoffman is board certified by the American Board of Radiology. He received specialty training in diagnostic radiology, magnetic resonance imaging, computed tomography, ultrasonography, mammography and interventional procedures.

Vladislav Tchatalbachev, MD

Staff Radiologist, Metro Imaging

Dr. Vladislav Tchatlbachev, MD

Dr. Tchatalbachev obtained his undergraduate and medical degrees at the University of Missouri in Kansas City. He completed his internship, diagnostic radiology residency, and musculoskeletal fellowship at the University of Missouri in Columbia. In addition to his fellowship training, Dr. Tchatalbachev has had specialty training in diagnostic radiology, magnetic resonance imaging, computed tomography, ultrasonography, mammography and interventional procedures.

Dr. Tchatalbachev was born in Bulgaria and moved to St. Louis at the age on ten.

Our Patients Tell Our Story Best

I am going to contact my physician and tell him to start referring patients to Metro. Since many people now have high deductibles, the cost for my exam was 1/3 the cost of just the technical component at the hospital. And I was offered a 40% discount if I paid at the point of service. I also didn't have the issue of parking and waiting like I have experienced in the past with hospital based radiology departments.

- West County Patient

I could not have had a better experience today. I came in to your center extremely nervous, and your staff made me feel like family before I left. This was such a pleasant experience; I have already told a dozen of my co-workers to visit your location if they ever need your services.

- South County Patient

I only go to Metro Imaging, even when the doctor wants me to go to his or her radiology department. Onsite results plus VIP service are prime reasons why I always come to Metro imaging for my radiology tests.

- North County Patient

I had been having my mammograms at a hospital for 20 yrs & decided to go to your facility this time since you are doing 3D at no additional cost to the patient. I am so glad I chose Metro Imaging.

- St. Peters Patient

It was a great experience. I was there for a routine x-ray and didn't have an appointment. I was only there about 35 minutes, what a pleasant alternative to going to the hospital for an x-ray, not to mention the cost savings! I will always choose Metro Imaging over the hospital.

- Richmond Heights Patient

Metro does an EXCELLENT job. I will never return to the hospital-based system again. I recommend Metro to all of my friends.

- St. Peters Patient

I have been in medicine for over 20 years and I have never seen or used a better facility. Efficient, professional, courteous, lower cost – better than any hospital I have seen, and I have used all in the County area as a patient and physician. I have sent my patients to several facilities, outpatient and hospital, nothing better. So all in all, Metro is the best in town for certain.

- West County Patient

OnSite Results eliminates what could be days of uncertainty while waiting for a follow-up from a physician. I received my results within minutes of finishing the exam.

- Richmond Heights Patient

Metro Imaging provides professional diagnostic imaging services in a convenient, service-oriented setting. Metro Imaging has been the model for outpatient imaging in the greater St. Louis area since 1994. Our five locations feature state-of-the-art technology, a friendly and caring staff, easy parking and a warm, upscale environment. With our exclusive OnSite Results, the choice is yours and the results are now.