What does "slice thickness" refer to in CT imaging?

Slice thickness in CT imaging refers to the width of the cross-sectional image that the scanner produces. This measurement is crucial because it determines the level of detail and resolution of the images obtained. Thinner slices typically yield higher resolution images, allowing for better visibility of structures and abnormalities within the scanned area. Conversely, thicker slices can lead to a loss of detail, as they may encompass more tissue and potentially obscure smaller lesions or anatomical nuances.

Understanding slice thickness is essential for optimizing image quality according to the clinical requirement. Adjusting this parameter can assist radiologists in identifying specific pathologies or in planning treatments. This concept is distinct from other factors related to imaging, such as patient dimensions, scan duration, or radiation exposure, which pertain to separate considerations in the imaging process.