Computed Tomography Scanner Principles and Radiation Dose

Audio Overview:

This chapter provides an in-depth look at Computed Tomography (CT) scanners, detailing their historical development from early models to modern multidetector and electron beam CT systems. It covers the fundamental concepts behind CT technology, including voxel creation, CT numbers (Hounsfield units), and the role of filters and detectors. Furthermore, the text addresses crucial aspects of CT image quality, explaining spatial resolution, low-contrast visibility, reconstruction algorithms, and various types of image artifacts. Finally, it outlines comprehensive quality control testing procedures for CT scanners and discusses patient radiation doses, including metrics like CTDI, DLP, and effective dose, emphasizing the importance of minimizing exposure, especially for vulnerable populations.

Radiologic Physics by Nickoloff, Edward L – Ahmad, Naveed.