NMTCB Positron Emission Tomography (PET) Practice Exam

The standard slice thickness in computed tomography (CT) imaging is commonly set at 5 mm. This thickness provides a balance between image detail and patient radiation exposure, helping to ensure adequate resolution for most diagnostic purposes without delivering excessive doses of ionizing radiation. Thinner slices, such as 2 mm, can provide greater detail in certain situations but may lead to increased noise and higher radiation doses. On the other hand, thicker slices, like 10 mm or 15 mm, can result in loss of anatomical detail and may impair the detection of small lesions. Thus, 5 mm is often the standard as it is sufficient for clear imaging while remaining mindful of patient safety.