Which diagnostic imaging technique is a series of x-ray photographs taken from different angles and combined by computer into a cross-sectional representation?

• A. Radiograph
• B. Arthrogram
• C. CT Scan
• D. Myelogram

Answer: (C)

Computed tomography uses many X-ray photographs taken from different angles and uses a computer to reconstruct them into cross-sectional images, or slices. This creates detailed views of internal structures in a plane and can be stacked to form a 3D representation. A single radiograph is just one 2D image, an arthrogram visualizes a joint with contrast, and a myelogram injects contrast into the spinal canal before imaging. So the method described is CT scanning.