Proud to be one of the largest private practice multi-specialty radiology groups in Western Pennsylvania
Slide background

Keen Minds

Attention to Detail

Problem Solvers


Team Skills

Brighton Radiology Associates began as a private practice in western PA with just 4 radiologists in 1978.  Since that time it has grown considerably in size, scope and degree of specialization to become one of the largest private radiology practices in Western PA.  Currently we rely on over 20 Board Certified Radiologists to take part in the care of tens of thousands of patients at our various hospitals and imaging centers.  This care is provided continuously through our 24/7 coverage policy which renders real-time final reports, every day of the year .

The Brighton Radiology team is committed to ensuring you receive exceptional care and the most positive experience possible.  If we do not meet your expectations, or if you have any questions, concerns, or comments please feel free to contact us at



Meet our Radiologists

Leonard DeRiggi M.D.

Undergraduate: University of Pittsburgh

Medical School: University of Pittsburgh School of Medicine

Residency: St. Francis Medical Center (Pittsburgh)

Fellowship: University of Pittsburgh Medical Center (Body Imaging)

Activities/Interests: Cross Sectional Body Imaging. Dr. DeRiggi joined Brighton Radiology in 2010, after practicing for 14 years with Almar Radiologists in Pittsburgh

Edward Estrin MD

Edward Estrin M.D.

Undergraduate: Rensselaer Polytechnic Institute

Medical School: Sackler School of Medicine

Residency: Wayne State University

Micael Gabriele MD

Michael Gabriele M.D.

Medical School: West Virginia University 

Residency: Mercy Hospital Pittsburgh 

Activities/Interests: Board Certified in Interventional Radiology and Diagnostic Radiology. 

Dr. Gabriele has been with Brighton Radiology for over 20 years.




Nathan Johnson MD

Nathan Johnson M.D.

Undergraduate: University of California, Berkeley
Medical School: University of California, Davis
Residency: University of Pittsburgh Medical Center, Diagnostic Radiology
Fellowship: University of Pittsburgh Medical Center, Abdominal Imaging 
Activities/Interests: After fellowship, Dr. Johnson joined the faculty at UPMC as Assistant Professor in the Department of Abdominal Imaging from 2010-2012. He joined Brighton Radiology in 2012 where he practices General Radiology while continuing his interest in Abdominal Imaging including abdominal and pelvic CT, PET/CT, MR, Ultrasound, and ultrasound-guided interventions. Additional interests include Women’s Imaging and Obstetrical Ultrasound. Dr. Johnson is Chairman of Radiology for Heritage Valley, Sewickley and serves on the Steering Committee for the Lung Cancer Screening Program

President, Brighton Radiology Associates 2017-Present

Saadia Khan DO

Saadia Khan D.O.

Undergraduate: Muhlenberg College, Allentown, PA 

Medical School: Lake Erie College of Osteopathic Medicine, Erie, PA   

Residency: UPMC   

Fellowship: Magee Women's Hospital UPMC

Activities/Interests: Breast Imaging and related procedures



Joseph Mollura MD - Brighton Radiology


Undergraduate: Duquesne University

Medical School: Temple University School of Medicine

Residency: National Capital Consortium, Walter Reed National Military Medical Center

Activities/Interests: Prior to joining Brighton Radiology, Dr. Mollura served nine years in the US Army stationed at Walter Reed National Military Medical Center in Washington D.C. as well as Fort Drum, NY. In addition to General Radiology, his interests include Musculoskeletal Imaging and Nuclear Medicine


Nicholas Naro MD - Brighton Radiology

Nicholas Naro M.D.

Undergraduate: University of Pittsburgh

Medical School: Northwestern University Feinberg School of Medicine 

Residency: UPMC Diagnostic Radiology

Fellowship: UPMC Neuroradiology

Activities/Interests: Neuroradiology, Head and Neck Imaging, 3D printing, Artificial Intelligence


Michael Nemer MD - Brighton Radiology

Michael Nemer M.D.

Undergraduate: University of Michigan

Medical School: Michigan State University-College of Medicine, M.D.

Residency: Beaumont Hospitals-Dearborn

Fellowship: University of Pittsburgh Medical Center (Musculoskeletal Imaging)

Activities/Interests: Dr Nemer joined Brighton in 2017 following his fellowship at UPMC. His interests are primarily related to his sub-specialty training (MRI, Ultrasound, CT, and Conventional Radiographs) with emphasis on Sports Medicine, Orthopedic Oncology, complex trauma, Rheumatology, and post-operative evaluation. He is one of the core physicians in Brighton Radiology’s dedicated MSK Ultrasound service at Heritage Valley Health System and performs image-guided injections of the spine, axial skeleton, and peripheral joints 

Mark Schnurer MD - Brighton Radiology

Mark Schnurer M.D.

Undergraduate: University of Pittsburgh

Medical School: University of Pittsburgh Medical School

Residency: Cook County Hospital, Chicago, Ill. 

Fellowship: West Penn Hospital Pittsburgh, PA (Interventional Radiology and Ultrasound}

Activities/Interests:  Interventional Radiology, Women's Imaging and General Radiology

Luke Stall MD - Brighton Radiology

Luke Stall M.D.

Undergraduate: United States Military Academy, West Point, NY

Medical School: Case Western Reserve University, Cleveland, OH

Residency: Virginia Mason Medical Center, Seattle, WA

Fellowship: Georgetown University, Washington DC

Activities/Interests: Vascular and Interventional Radiology, Uterine Artery Embolization 



Juston Torok MD - Brighton Radiology


Undergraduate: University of Notre Dame, South Bend IN

Medical School: The Pennsylvania State College of Medicine, Hershey PA

Residency: Transitional Year, Mercy Hospital, Pittsburgh PA. Diagnostic Radiology, University of Pittsburgh Medical Center, Pittsburgh PA

Fellowship: Combined Abdominal Imaging (UPMC Presbyterian and Shadyside) and Women’s Imaging (UPMC Magee)

Activities/Interests: Director of Heritage Valley Breast Care. lnterests in all aspects of Breast Imaging including 3D Mammography and 3D Ultrasound, Breast MRI and Breast biopsy, Body MRI, DEXA



Craig Trent MD - Brighton Radiology

Craig Trent M.D.

Undergraduate: Franklin and Marshall College

Medical School: University of Pittsburgh

Residency: Mercy Hospital of Pittsburgh

Activities/InterestsThoracic Radiology, Nuclear Medicine




Deborah Troy MD - Brighton Radiology

Deborah Troy M.D. CCD

Undergraduate:  Mary Washington College, Fredericksburg, VA
Medical School:  Medical University of South Carolina, Charleston, SC
Residency:  Alton Ochsner Medical Foundation, New Orleans, LA. 
Certified:  Clinical Densitometer
Activities/Interests: Women's Imaging including mammography, Ultrasound including breast and OB/GYN, Breast MR and biopsy, Body Imaging, Bone Densitometry, 



Ziggas - Brighton Radiology

Katelyn Ziggas D.O.

Undergraduate:  University of Pittsburgh
Medical School: 
Lake Erie College of Osteopathic Medicine
Allegheny Health Network Medical Education Consortium (AGH) Diagnostic Radiology
Allegheny Health Network Medical Education Consortium (AGH) Musculoskeletal Radiology
Board Certified: American Board of Radiology, Diagnostic Radiology
Dr. Ziggas joined Brighton Radiology in 2019 and currently serves on the Brighton Executive Committee, having previously served on the Peer Review committee. Dr. Ziggas’ interests are primarily related to her specialty in Musculoskeletal Radiology and include all diagnostic modalities with a focus on MRI and Ultrasound as well as image guided interventions.