The brain scan, whose most accurate name is brain tomography (SPECT), is a test that is performed to detect changes in blood circulation and brain function, and is usually done to help identify or monitor degenerative brain diseases, such as Alzheimer’s disease, Parkinson’s disease or tumor. , especially when other tests such as MRI or CT scan are not enough to confirm suspicion.
The brain scan is performed by injecting drugs called radiopharmaceuticals or radiotragers, capable of adhering to brain tissue, allowing the formation of images in the device.
- The scan is performed by the doctor and can be performed in hospitals or clinics that perform nuclear medicine examinations.
- At medical request.
- Through the SUS.
- Certain conventions or privately.
Brain scans provide information about blood infusion and brain function, which are very useful in situations such as:
Brain scans are often requested when there are doubts about the diagnosis of a neurological disease, as tests such as MRI and CT scan, as they show more structural changes and the anatomy of brain tissue, may not be enough to clarify some cases.
No specific preparation is required for a brain scan. On the day of the exam, the patient is advised to rest approximately 15 to 30 minutes in a quiet room to minimize anxiety and ensure better test quality.
The radiopharmaceutical, usually technetium-99m or thallium, is then applied to the patient’s vein, which should wait at least 1 hour for the substance to properly concentrate on the brain before the images can be taken into the device for approximately 40 to 60 minutes. . During this period, it is necessary to remain still and lying down, as movement can interfere with the formation of images.
The patient is then discharged for normal activities. Radiopharmaceuticals used usually do not cause reactions or damage to the health of the test taker.
Brain scans are contraindicated for pregnant or lactating women and should be reported in the presence of any suspicion.