Computed Tomography Technologist Practice Exam 2026 - Free CT Technologist Practice Questions and Study Guide

The primary function of the analog-to-digital converter (ADC) in a CT scanner is to convert the analog electrical signals generated by the detector array into a digital format that can be processed by the computer for image reconstruction and analysis. When X-rays pass through the body, they produce varying levels of attenuation depending on the type of tissue. The detectors then generate analog signals that represent this information. The ADC plays a crucial role in ensuring that these analog signals are accurately digitized, allowing for precise digital image processing.

This conversion to a digital signal is essential because digital signals are easier to manipulate, store, and transmit than their analog counterparts. It allows for enhanced image quality and better overall performance of the CT system, facilitating improved diagnostic capabilities. By converting the signals, the system can apply mathematical algorithms to reconstruct images, ensuring clinicians can make informed decisions based on precise data representation.

The other options refer to functions and processes that are not the specific role of the ADC. Amplification of electrical signals is typically handled by other components in the scanner. Image filtering is part of the image processing steps but is done after conversion, not by the ADC itself. Modifying the patient's radiation dose relates to protocols and safety measures in imaging, which are outside the scope of