adrenal CT scan

CT examination of the adrenal gland is a method of examining the adrenal gland by CT. Basic Information Specialist classification: Oncology examination classification: CT Applicable gender: whether men and women apply fasting: fasting Tips: Please cooperate with the doctor when checking. Normal value No abnormality. Clinical significance 1. Clinical manifestations and biochemical tests in patients with suspected adrenal disorders, CT can identify the cause and further clarify the location and nature of the tumor. 2. Review of the adrenal gland after surgery to observe the presence or absence of recurrence. 3. B-ultrasound can not be detected due to obesity, can be used for CT examination. Suitable for 1. Adrenal tumors, hyperplasia and other pathological changes, clinically suspected pheochromocytoma. 2. Guide a needle biopsy for adrenal lesions. Precautions 1. Carefully check the CT examination application form, understand the condition, clarify the purpose and requirements of the examination, and the application form for the purpose of the examination and the unclear requirements should be confirmed with the clinician. 2. Train the patient to breathe and hold their breath. 3. For enhanced scanners, prepare according to the requirements for use of iodine-containing contrast agents. 4. Fasting 4 hours before the test. 5. Take 1% to 2% of the aqueous solution containing iodine contrast agent 500~800ml within 30 minutes before the examination, and then take 300ml before the machine. Inspection process 1. Prepare for inspection. 2. Inspection method and scanning parameters (1) Flat sweep: 1 Scanning position: supine position, the body is placed in the middle of the bed, and the arms are raised on both arms. 2 scanning method: continuous scanning of cross section. 3 Positioning scan: Determine the scanning range, layer thickness, and layer spacing. 4 scanning range: the upper edge of the 12th thoracic vertebra to the lower edge of the 1st lumbar vertebrae. 5 Scanning rack tilt angle: Scan the rack 0°. 6 scan field (FOV): body range. 7 scanning layer thickness: 1 ~ 3mm. 8 scanning interval: 1 ~ 3mm. 9 reconstruction algorithm: soft tissue or standard algorithm. 10 scan parameters: according to CT model settings. (2) Enhanced scan: In order to understand the blood supply of the lesion or the differential diagnosis, it can be used for enhanced scanning. When clinically suggestive of pheochromocytoma, the rate of contrast injection should be appropriately slowed to avoid hypertensive crisis. 1 contrast agent dosage: 80 ~ 100ml ionic or non-ionic iodine containing contrast agent. 2 injection method: intravenous injection of pressure syringe or pressurized rapid push bolus, injection rate of 2 ~ 3ml / s. 3 Scanning start time: continuous scanning (8 to 10 s scanning period) after 60 to 80 ml injection. 4 Other scanners and scan parameters: same as plain scan. 3. Photo film requirements (1) Shoot the positioning piece, sweep and enhance the image in sequence. (2) The image display adopts 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 of the lesion level, and measure the change of CT value before and after the enhancement of the lesion level if necessary. Not suitable for the crowd 1. Serious heart, liver and kidney dysfunction. 2. Allergic to iodine contrast agents. Adverse reactions and risks May cause delayed allergic reactions.