This question is rather general, because jewelry has metal and non-metal, and is worn on different parts of the hand, neck, ear, etc., so it cannot be generalized. When doing CT examinations on body surface items including dress and accessories, the requirement is that there should be no metal items within the scanning area, including metal-containing jewelry, metal accessories on clothing, cell phones, keys, coins, etc.. Because these metal items will produce artifacts around the scan, affecting the image quality and may cause unwanted artifacts. However, metal items that are not in the scanning range will not affect the image quality, such as wearing necklaces and earrings when doing abdominal CT will not affect the examination. However, metal belt buckles and metal zippers on clothes must be removed. Therefore, before doing the examination, you should know which part of the body you need to examine, and remove the metal objects from that part in advance, especially the metal-containing part of the underwear must be removed in advance. However, please rest assured that the medical staff will remind the patient before the examination, but you should also rest assured.