Computed Tomography Technologist Practice Exam 2026 – All-in-One Guide for Exam Success!

The formula for calculating pixel size in a CT scan involves understanding the relationship between the Display Field of View (DFOV) and the matrix size. The correct formula indicates that the size of each pixel can be determined by dividing the DFOV by the matrix size.

In essence, DFOV refers to the extent of the area being scanned, while the matrix size represents the number of pixels used to encode that area. By dividing the total field of view by the number of pixels in the matrix, you can determine the size of each individual pixel. This is crucial for image resolution, as smaller pixel sizes typically lead to greater detail and clarity in the resultant images.

Other formulas, while potentially applicable in different contexts, do not pertain to pixel size directly in the way that this formula does. For instance, slice thickness and pitch are relevant to volumetric imaging but relate to different aspects of image acquisition and do not factor into pixel dimensions directly. Thus, the correct formula is a fundamental component of understanding image quality in CT imaging.