Interventional Radiology

Great Lakes Medical Imaging is proud to provide non-invasive procedures in a comfortable, outpatient setting. Scroll down for a list of services we offer.

Interventional Radiology

What are Interventional Radiologists?

Interventional Radiologists are board-certified physicians who deliver minimally invasive treatments with less risk, less pain and less recovery time than traditional surgery. Most interventional radiology (IR) procedures are delivered via catheters through a tiny nick in the skin and imaging guidance to deliver precise treatment. Patients undergoing IR procedures are generally performed under local anesthetic or conscious sedation to help make the patient more comfortable during their procedure. Lastly, many procedures are performed at our outpatient facility and discharged same day or in the hospital with a short overnight stay. 

Come visit  Dr. McGrathDr. Nicholas, Dr. Chohan and Dr. Grinstead

and their team at our Interventional Radiology clinic at Park Club Lane.

Schedule An Appointment Today

Call 716-836-4646 option 3

Contact Us

Now Offering the Following Services

  • Lumbar Punctures
  • Peripheral Arterial Disease
  • Peripheral Ulcers (venous and arterial)
  • Acute and Chronic Deep Venous Thrombosis
  • Venous Insufficiency/Reflux (May-Thurner Disease)
  • Prostate Artery Embolization
  • Uterine Fibroid Embolization
  • Varicocele Embolization
  • Pelvic Congestion Embolization
  • PICC Lines and Vascular Access (including Dialysis Interventions)
  • Port Insertion
  • Locoregional Liver Therapy (Chemoembolization, Radioembolization, and Ablation)
  • Thermal Ablation of Renal Masses
  • Interventional Pain Management
  • Kyphoplasty
  • Feeding Tube Management
  • Nephrostomy Tube Management
  • Biliary Tube Management
  • Drain Management 
  • Percutaneous Biopsy and Aspiration
  • IVC Filter insertion and removal

WNY Living Segment

Meet Your Doctors

Dr. Jack McGrath

Dr. Christopher Nicholas

Dr. Christopher Nicholas was born in New Jersey and raised in St. Johns, Newfoundland, Canada. He graduated from Memorial University of Newfoundland with his Bachelors of Science (joint honors biochemistry and behavioral neuroscience) and continued on there to complete his MD and diagnostic radiology residency. He completed his sub-specialty fellowship training in vascular and interventional radiology at the University of British Columbia.

Dr. Nicholas started his career traveling to various towns/cities as a locum physician but has subsequently set down roots in Buffalo with Great Lakes Medical Imaging. He provides interventional radiology services in our outpatient headquarters in Williamsville as well as Buffalo General, Millard Fillmore Suburban, ECMC, and Niagara Falls Memorial Hospital.

Dr. Nicholas always puts the patient first. He is passionate about the services he provides and making a difference in the lives of those he treats.

Dr. Omar Chohan

Dr. Omar Chohan was born and raised in Olean, New York. After high school, he went to study Nutrition at Drexel University in Philadelphia, Pennsylvania where he received his Bachelors in Nutritional Sciences. During this time a solid foundation was built understanding how foods we eat affect our daily lives. Dr. Chohan then went on to become a Doctor of Osteopathic Medicine at Lake Erie College of Osteopathic Medicine in Erie, Pennsylvania. The philosophy of Osteopathic Medicine was a complementary fit for his background in Nutrition. He fostered a desire to deliver care that focused not only on the symptom but addresses the patient and external factors. During medical school, Dr. Chohan grew interested in Radiology as it allowed Physicians to see the body in a different way.

Dr. Chohan completed his Diagnostic Radiology Residency at Christiana Care Health System in Newark, Delaware. He presented at national conferences and published in local and national journals. He coauthored a Radiology/Pathology book 23 Autopsies: A Companion for the Study of Pathology. As Chief Resident, he developed lectures, taught junior residents, and performed administrative duties. Among his successes during Residency, nothing could replace his drive for Vascular and Interventional Radiology.

Dr. Chohan continued at Christiana Care Health System to complete his Fellowship in Vascular and Interventional Radiology. He learned to treat various disease throughout the body using minimally invasive surgery with nothing but a small needle and a tiny nick in the skin. He is passionate about peripheral vascular disease, venous disease, wound healing, pain management, oncology, women’s and men’s health.

Dr. Chohan is proud to return to his Western NY roots at Great Lakes Medical Imaging to treat his patients with compassion and the highest level of care to improve their quality of life.

Dr. Richard Grinstead, D.O.

Dr. Rich Grinstead grew up in the Finger Lakes region of upstate New York. He received a Bachelors of Science in Biology from the University of Pittsburgh while also competing on the Men's Varsity Swimming and Diving Team, where he served as captain his senior year. Dr. Grinstead then went on to become a Doctor of Osteopathic Medicine at Lake Erie College of Osteopathic Medicine in Erie, Pennsylvania. After medical school, Dr. Grinstead served 5 years with the United States Air Force as a Flight Surgeon, specializing in Aerospace Medicine and the effect changes in temperature, altitude and pressure had on the human body as it relates to military personnel and patients. He also had the pleasure of working/training with the USAF Special Forces community. He deployed to Afghanistan for 9 months as a Flight Surgeon working with both American and British coalition forces.

Dr. Grinstead completed his Diagnostic Radiology Residency at Arnot Ogden Medical Center in Elmira, New York. As the second class through a newly established residency, Dr. Grinstead had the unique challenge and opportunity to help build the residency program and curriculum. He helped lay the foundation of the program and its eventual ACGME accreditation. As Chief Resident, he developed lectures, taught junior residents, and performed administrative duties. It was during residency Dr. Grinstead was introduced to the fascinating world of Interventional Radiology. He became enthralled with the idea of being able to diagnose and treat diseases in a minimally invasive way.

Dr. Grinstead attended the University of Rochester/Strong Memorial Hospital to complete his Fellowship in Vascular and Interventional Radiology. He learned to think critically and creatively in order to treat diverse disease processes throughout the body using image guidance and access through a small skin nick. His professional passions include interventional oncology, hepatobiliary interventions, pain management, peripheral arterial and venous disease, women’s and men’s health.

Dr. Grinstead is excited to pursue his passion with Great Lakes Medical Imaging and continue exceeding the standard of excellence for his patients.

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We offer our patients convenient, accessible care with multiple locations throughout Western New York.