Computed Tomography Technologist Practice Exam 2025 - Free CT Technologist Practice Questions and Study Guide

The Data Acquisition System (DAS) is an integral component of Computed Tomography (CT) systems, primarily responsible for measuring the x-ray photons that are detected after passing through the patient's body. When the x-ray tube emits radiation, this radiation interacts with the tissues, and a portion of it is transmitted to the detectors. The DAS quantifies these x-ray photons, converting the analog signals received from the detectors into digital signals. This conversion is essential for creating the cross-sectional images that CT is known for.

The other roles mentioned, such as adjusting scanner settings, storing patient images, and calibrating the scanner, fall under different system components or procedures. While some may indirectly involve the DAS, they are not the primary function of the DAS itself. The accuracy of the measurements taken by the DAS significantly influences the quality of the resulting images, making its role critical in the overall imaging process.