Final answer:
Computed tomography (CT) is a radiographic technique that can determine the depth of a discontinuity in a test object using multiple exposures and mathematical calculations. It uses computers to analyze cross-sectional X-rays to reveal detailed structures in the body.
Step-by-step explanation:
A radiographic technique that can determine the depth of a discontinuity in a test object by making multiple exposures and performing a mathematical calculation is computed tomography (CT). CT is a noninvasive imaging technique that uses computers to analyze several cross-sectional X-rays in order to reveal minute details about structures in the body. In CT, a patient lies on a motorized platform while a computerized axial tomography (CAT) scanner rotates 360 degrees around the patient, taking X-ray images. A computer combines these images into a two-dimensional view of the scanned area.