computed tomographic colonography

noun

variants also computerized tomographic colonography or computed tomography colonography

: ct colonography

The radiologists have their own procedure—the computed tomographic colonography (CTC), or virtual colonoscopy. It uses X-rays and computers to produce multiple images of the inside of the colon.

—The Boston Globe

Tests that detect both pre-cancerous polyps and cancer include colonoscopy, flexible sigmoidoscopy, double-contrast barium enema, and computerized tomographic colonography …

—Food & Fitness Advisor

You're right about the president having a virtual colonoscopy (which is a nickname; the more formal term is computed tomography colonography).

—Robert J. Mayer, Harvard Health Letter