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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What is CT Angiography? Angiography is a minimally invasive medical test that helps physicians diagnose and treat medical conditions. Angiography uses one of three imaging technologies and, in most cases, a contrast material injection is needed to produce pictures of blood vessels in the body. Angiography is performed using: x-rays with catheters computed tomography (CT) magnetic resonance imaging (MRI) CT angiography uses a CT scanner to produce detailed images of both blood vessels and tissues in various parts of the body. An iodine-rich contrast...

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What does TIPS stand for? TIPS stands for transjular intrahepatic portosystemic shunt: Transjugular – through the jugular vein in your neck Intrahepatic – within your liver Portosystemic – from the portal vein to the hepatic vein Shunt – a tube that allows flow from one blood system to another What is a TIPS procedure? A transjugular intrahepatic portosystemic shunt (TIPS) is a procedure where a path is created in the liver to connect two veins, the path is called a shunt. The shunt is held open by a small tube called a stent (see picture...

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Body Imaging

body image

ERA’s body imaging specialists utilize modern imaging equipment and powerful computer systems  to identify disease formations at an earlier stage through the use of body imaging. Our radiologists work closely with physicians and/or specialists to provide interpretations based on body image scans. Our radiologist’s ability to view the body’s internal structures and system functions enables them to detect and diagnose disease and illnesses earlier in a non-invasive manner, leading to treatment and intervention in the timeliest manner...

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