organ tomography

Organ tomography is used to observe the internal conditions of organs, mainly deep radioactive distribution. ECT performs an early assessment based on organ blood supply and cellular metabolic changes through three-dimensional tomography. Multi-plane information is acquired by rotating the target organ 360 degrees (or 180 degrees), and image processing (reconstruction, slice, enlargement, projection) is performed by computer to obtain cross-sectional images of different observation surfaces and depths of a certain thickness. Basic Information Specialist Category: Cardiovascular Examination Category: Radionuclide Applicable gender: whether men and women apply fasting: fasting Tips: Check the day to enter the examination room on an empty stomach. Normal value The SPCET probe is rotated around the body surface to collect information, or three-dimensional information is collected simultaneously around the body with PET, processed and reconstructed into transverse, coronal and sagittal tomographic images. The tomographic image can show the radioactivity distribution in the organ more accurately. Clinical significance Abnormal results: such as cardiac tomography coronary heart disease myocardial ischemia, myocardial infarction, myocardial survival determination, to guide the choice of clinical treatment options. People who need to be examined: Organs with diseases and tumors can be examined. Precautions Forbidden before inspection: Check the empty stomach into the examination room on the same day. Requirements for inspection: should be at rest and use sedative if necessary. 1, cerebral blood flow tomography: 1 and 2 days before the examination, the patient tried to stop the expansion of the cerebral vasculature to increase the sensitivity of the examination. 30-60 minutes before the injection of imaging agents, oral potassium perchlorate should be prescribed according to the doctor's advice to close the choroid plexus and thyroid to reduce interference. 5-10 minutes before and after the injection, the patient should try to rest, reduce the sound and light stimulation, stay in bed and keep calm and wear eye mask and earplugs until about 10 minutes after the injection of imaging agent. The head cannot be moved during the inspection to ensure the authenticity of the image. 2, myocardial perfusion imaging: the day before the examination should stop nitroglycerin, easy to pulse, Diao Xinxue Kang and other drugs. For example, it is best to stop the drugs such as propranolol, heart rhythm, betaloc, isobolidine, and methoxybenzamine in the first two days. Those who have undergone myocardial drug load testing should discontinue drugs such as dipyridamole, dobutamine, and aminophylline 24 hours before. Breathing should be kept steady during the examination to reduce the interference of diaphragm muscle movement on myocardial imaging. The person who installs the cardiac pacemaker should inform the doctor for reference in the image analysis. 3, whole body bone imaging: as much as possible to drink more than 500ml within 2 hours after the injection of imaging agents. Empty the urine before checking. If you have urine contaminated underwear or skin, you should wipe the skin and change your underwear before you can check it. If a metal prosthesis or a fake breast is implanted, the doctor should be informed of the implanted site. It is not advisable to check for barium meal, barium enema, etc. two days before the test. In order to prevent the expectorant from staying in the intestine, it affects the image observation. 4, glomerular filtration rate determination: as long as the first three days to stop diuretics, such as hydrochlorothiazide, furosemide and so on. Drink about 300ml of water in the first 30 minutes of the examination, and empty the urine when checking. 5, esophageal motor function imaging and gastric emptying measurement: patients should be fasted for 6-12 hours before the examination and according to the doctor's advice to stop atropine, Xintongding, Deshute, Dingshunning, cimetidine, famotidine Ding and gastric motility drugs, such as morphine, Pribos and so on. 6, thyroid imaging: according to doctor's advice to stop iodine-containing drugs and iodine-rich foods, such as kelp, seaweed, sea fish and shrimp, and stop thyroid tablets. Iodine contrast agents should be used for at least three weeks before examination. In the examination, if the child or the patient who is unable to cooperate, the sedative can be used before the examination. An analgesic can be used beforehand because the pain cannot be combined with the test. Metal objects worn on the parts to be inspected, such as jewelry, metal buttons, belts, keys, coins, etc., should be removed before inspection. Since most of the drugs used for ECT examination are excreted from the urine, it is possible to accelerate the discharge of the drug by drinking more water after the examination. Inspection process Multi-plane information is acquired by rotating the target organ 360 degrees (or 180 degrees), and image processing (reconstruction, slice, enlargement, projection) is performed by computer to obtain cross-sectional images of different observation surfaces and depths of a certain thickness. Such an image computer can combine them into a stereogram (rotating in different directions, rotating at different speeds for viewing). Not suitable for the crowd Inappropriate people: no special requirements. Adverse reactions and risks Nothing.

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