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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Y-90 Radiotherapy for Liver Tumors

Y-90

What is Yttrium-90 (Y-90) Radiotherapy? Y-90 Radiotherapy is a special procedure that is done to treat tumors in your liver. In this type of treatment, tiny radioactive beads are injected into the vessels that supply your liver tumor with blood. The tiny beads will stay in the blood vessels around your tumor and allow radiation to reach the tumor(s) directly. Because these beads are delivered directly to your tumor, there is very little effect on the healthy parts of your liver or other tissues around your liver. The beads will put off radiation...

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Tumor Cryoablation

What is tumor cryoablation? Tumor cryoablation is a procedure that uses extreme cold to freeze and destroy cancer cells. Cryoablation is used to treat tumors of the kidney. How is tumor cyroablation done? A needle-like applicator will be placed in contact with the tumor, more than one applicator may be used depending on the tumor size and location. Dr. Christenson will use ultrasound and other x-ray imaging to guide the applicator(s) to the treatment site. Once the applicator is in the correct location, Dr. Christenson will administer argon gas...

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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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