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

Pre-patient collimation adjustments play a significant role in determining the quality of CT scan results, primarily by influencing image resolution and slice thickness. When collimation is adjusted before the x-ray beam reaches the patient, it limits the width of the slice being scanned. This process directly impacts the amount of tissue being imaged and can enhance the sharpness and clarity of the resulting images.

Tighter collimation can lead to higher image resolution because it reduces the amount of scattered radiation that reaches the detector, resulting in less noise and more defined edges within the images. Additionally, by controlling the slice thickness, radiologists can obtain thinner slices, which can improve the detail visible in cross-sectional images and facilitate better imaging of smaller anatomical structures.

The other options do not accurately capture the impact of pre-patient collimation. For example, while pixel size can be indirectly influenced by collimation, this adjustment primarily affects resolution and thickness rather than pixel dimensions solely. Furthermore, automatic exposure control can be designed to respond to changes in collimation, meaning it is relevant rather than irrelevant. Lastly, pre-patient collimation is crucial for radiation dose management; tighter collimation generally results in lower radiation exposure to the patient, which contrasts with