The document discusses the use of computed tomography (CT) scans to assess body composition. It notes that CT scans can provide highly accurate and detailed images of tissues like fat, muscle, and organs. The advantages of CT scans are its high resolution images, ability to quantify tissues, and clinical usefulness when images are already being taken. However, concerns include the costs, specialized skills and equipment required, and risks of radiation exposure. The document concludes that while radiation risks exist, CT scans remain very useful for diagnostic purposes due to their image quality and information provided.