SPECT imaging

SPECT is an instrument for in vivo function and metabolic imaging by means of single photon nuclide labeling drugs. It is one of the basic instruments for nuclear medicine imaging and is currently equipped in most prefecture-level hospitals in the diagnosis of diseases. makes an important impact. It is characterized by the ability to reflect information on blood perfusion and material metabolism of tissues and organs. At the same time, the used nuclide has a long half-life and is easy to prepare and transport, so the use cost is low and it is easy to promote. However, due to the limitation of resolution, the anatomical structure cannot be clearly displayed, which makes the positioning of the lesion difficult. At present, the SPECT/CT fusion model has been produced, which can accurately combine the functional image of SPECT with the image of diagnostic CT, which makes up for the deficiencies of SPECT in anatomical positioning and resolution, and has great application prospects. Basic Information Specialist Category: Cardiovascular Examination Category: Radionuclide Applicable gender: whether men and women apply fasting: not fasting Analysis results: Below normal: Normal value: no Above normal: negative: The range of imaging is for each part or part of the receptor, and the image is clear and of good quality. Positive: Although SPECT is not as good as CT, MRT and ultrasound in displaying subtle anatomical structures, in addition to showing the position, shape and size of organs or lesions, the main advantage of SPECT is the ability to display blood flow of organs or lesions with high specificity. Changes in function, metabolism, and metabolism are conducive to early diagnosis and specific diagnosis of the disease. Tips: Obey the doctor's arrangements when checking. Normal value The range of imaging is for each part or part of the receptor, and the image is clear and of good quality. The abnormal radioactive concentration or sparse defect of the lesion can be judged or qualitatively diagnosed by visual inspection. The ROI technique can also be used to obtain the target organ tissue and background (target/background, respectively) in the lesion and the corresponding normal tissue. Semi-quantitative analysis of the T/B) uptake ratio assisted diagnosis. Clinical significance Abnormal results: Although SPECT is not as good as CT, MRT and ultrasound in displaying subtle anatomical structure, in addition to showing the position, shape and size of organs or lesions, the main advantage of SPECT is that it can display organs or lesions with high specificity. Changes in blood flow, function and metabolism are conducive to early diagnosis and specific diagnosis of the disease. For example, bone imaging can simultaneously show the shape of various bones of the whole body and the blood supply and metabolism of each local bone. The bone metastasis can be diagnosed 3 to 6 months earlier than X-ray; non-invasive myocardial perfusion imaging is the current diagnosis of myocardial The most accurate examination method for ischemic and myocardial cell viability analysis; the diagnosis of thyroid morphology and function and the identification of the benign and malignant properties of thyroid nodules have considerable advantages; renal dynamic imaging is significantly more sensitive to the diagnosis of renal function than X Line renal pelvic venography has unique value for understanding renal function and urinary tract infarction. People who need to be examined: organs and diseases related to tumors can be examined. Positive results may be diseases: spinal metastases, globus pallidus substantia nigra pigmentosa, schizophrenia, pediatric new variants Kreuzfeldt-Jacob disease, pediatric viral myocarditis considerations Pre-inspection contraindications: The doctor will inform the patient to urinate, eat or some other preparation before filming, in order to make the examination more accurate. Such as: Preparation for the patient before the whole body bone imaging examination: After the injection of the imaging agent, the patient needs to drink more water. Generally, the drinking water is about 500-1000 ml within two hours after the injection. When urinating, the urine should be prevented from contaminating the underwear and the body. Contamination should be promptly replaced with contaminated clothing and the skin should be cleaned before being inspected, and the urine should be drained before the inspection. At the same time, metal objects such as necklaces, keys and coins on the body should be removed to prevent the inspection results from being affected. If the patient has had a digestive tract angiography in the radiology department in the near future, it should be checked after 2 days, otherwise the imaging results will be affected. Requirements for inspection: When the patient is lying on the bed while filming, he can breathe normally. According to the doctor's request, the photographer will take a certain posture. The detector will try to be close to the patient's body and take one or more photos. At this time, just take a picture and not increase it. Additional radioactivity. Inspection process In vivo function and metabolic imaging are achieved by means of a single photon nuclide labeling drug. Not suitable for the crowd Inappropriate people: no special requirements. Adverse reactions and risks Nothing.