CT is a form of tomography that uses radiation to scan the lesion, and is a common imaging method for head, lung, abdomen or skeletal system problems. CT can be chosen when there is a problem with the head, lungs, abdomen or skeletal system. CT is a common imaging test used in imaging departments. CT is usually chosen when there is a problem in the head, lungs, abdomen or skeletal system. CT is usually chosen when there is a problem in the patient’s general examination and further examination is needed.