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

The term "tails" in the context of computed tomography refers to areas of scatter that fall into adjacent slices. This phenomenon occurs because, during the imaging process, some of the radiation can scatter from the original path due to interactions with matter, such as tissues or the surrounding structures within the body. This scattered radiation can then contribute to the dose received by adjacent slices, resulting in what are referred to as "tails."

This effect is particularly pertinent in CT imaging since it can influence the accuracy of dose estimates and the quality of the images produced. Understanding this concept is essential for CT technologists, as it helps them optimize imaging protocols to minimize unnecessary exposure while maintaining diagnostic quality. In contrast, areas of increased radiation exposure, errors in dose calculations, or regions of decreased tissue response do not accurately capture the essence of what "tails" signify in the context of CT dose distribution.