About ERA

Eastern Radiological Associates (ERA) is a professional partnership of board certified radiologists (doctors trained in medical imaging and image interpretation) who have been providing radiology professional services since 1970. Our mission is simple. Eastern Radiological Associates serves the patient and physician community of the region (Montana, Wyoming, and surrounding) by providing the highest quality diagnostic imaging and interventional services in a caring and compassionate atmosphere. Did you know? We are involved in the Yellowstone community… learn...

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Meet the Radiologists

John Bisges

John D. Bisges, MD

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Services

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Breast Imaging

Breast Imaging

Radiologists of Eastern Radiological Associates provide radiological services exclusively to Yellowstone Breast Center. The Yellowstone Breast Center, which is part of Saint Vincent Healthcare, is accredited by the National Accreditation Program for Breast Centers and certified by the FDA. The Yellowstone Breast Center has been accredited by the American College of Radiology as a Breast Imaging Center of Excellence for demonstrating excellence in breast imaging by successfully achieving accreditation in: Digital Mammography Digital Mobile Mammography Breast...

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Vascular Malformation Sclerotherapy/ Embolization

human vascular system

What are vascular malformations? Vascular malformations are blood vessels that did not develop normally before birth. The abnormally developed vessels can be arteries or veins; they may even include lymph vessels. Even though these abnormal vessels are present at birth, you may not know you have them until later in life. What are the symptoms? Venous malformations (abnormal veins) can cause pain, swelling, or changes in skin color. They can also bleed or leak fluids. Arterial malformations (abnormal arteries) can cause pain and bleeding. They can...

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Pediatric imaging

Pediatric Imaging

Pediatric radiology is devoted to the care of children, using advanced imaging equipment to assist pediatricians in determining the best way to assess a specific problem while minimizing radiation dose. Pediatric radiologists are specially trained to understand the unique needs of children, parents, and pediatricians in the diagnostic process, with detailed knowledge of illnesses and medical conditions of infants and children. Dr. Delavan is subspecialty trained in pediatric radiology at Children’s Hospital Colorado, giving ERA unique expertise...

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