Amyloid deposition is a clinical syndrome caused by the deposition of amyloid between the cells of various organs in the body due to multiple causes, resulting in the progressive failure of the involved organs. Amyloidosis often involves multiple systems and organs, and its clinical manifestations depend on the organs involved and the degree of damage to the affected organs. The examination items of amyloidosis: 1. CT examination of kidneys CT examination of kidneys is a method to examine the kidneys by CT. The purpose is to check kidney diseases, such as stones, inflammation, tumors, etc. It is suitable for the examination of patients with kidney diseases. CT can be used for the examination of many kinds of diseases and has auxiliary significance to the diagnosis of diseases. CT examination process: (1) Lie on the bed of CT examination instrument. (2) CT scan the corresponding part of the kidney. 2.CT examination of adrenal gland CT examination of adrenal gland is a method to examine the adrenal gland by CT. CT examination of adrenal gland can understand the lesions of adrenal gland and has diagnostic significance for adrenal gland diseases. The procedure of adrenal CT examination: (1) Prepare for the examination. (2) Examination method and scanning parameters Plain scan: ①Scanning position: supine position, body in the middle of the bed, both arms up holding the head. ②scanning mode: cross-sectional continuous scanning. ③Localization scanning: determine the scanning range, layer thickness and layer distance. ④Scanning range: the upper edge of the 12th thoracic vertebra to the lower edge of the 1st lumbar vertebra. ⑤Scanning frame tilt angle: scanning frame 0°. ⑥Scanning field (FOV): range of body part. ⑦Scanning layer thickness: 1 to 3 mm. ⑧Scanning interval: 1 to 3 mm. ⑨Reconstruction algorithm: soft tissue or standard algorithm. ⑩Scanning parameters: set according to the CT model. Enhancement scan: In order to understand the blood supply of the lesion or if there is difficulty in differential diagnosis, enhancement scan can be performed. When pheochromocytoma is clinically indicated, then contrast injection should be slowed down appropriately to avoid hypertensive crisis. ①Contrast agent dosage: 80-100 ml of ionic or non-ionic iodine-containing contrast agent. ②Injection method: pressure syringe intravenous group injection or pressurized rapid hand-push group injection, injection rate 2~3ml/s. ③Scanning start time: continuous scanning (8~10s scanning cycle) starts after 60~80ml injection. ④Other scanning procedures and scanning parameters: the same as plain scanning. (1) Sequential shooting of positioning film, plain scan and enhanced images. (2) Soft tissue window, window position L25~45HU, window width W200~400HU. (3) Coronal and sagittal reconstruction and radiography if necessary. (4) Measure the CT value and size at the level of the lesion, and measure the change in CT value before and after enhancement at the level of the lesion if necessary.