Positron emission tomography or PET scan: The is radionuclide modus operandi creates a cross-sectional i.e. transverse picture of the distribution of radioactivity via release or positrons in particular area of the body. It is analogous to the CT scan, however, radioisotopes are used to the tissues to be scanned. In this way pictures are taken showing where the radionuclide i.e. carbon-11C, glucose, oxygen-15. The region of low metabolic activity is found by PET scans in schizophrenic patients, however, neurological disorders for example Alzheimer's disease, strokes, epilepsy, and tumors in brain if any can be traced. This scanning is also useful in finding out heart, lung, and gastrointestinal disorders.
Thyroid scan: Radionuclide substance is dispensed via intravenous route. The examination result of the scanning will help to find out the size and shape of the thyroid gland. The nodules of hyperfunctioning activity in the thyroid will gather higher quantity of radioactive substance and form "hot spots". If any cancer in the thyroid the substance dispensed does not assemble the iodine 1311 substance and forms the "cold spots" in the pictures of the scan.
Thyroid Uptake Scan: Radioactive iodine compound 1311 is given orally by capsule. Before given the quantity of radioactive substance is measured first. After the quantity of radioactive material absorbed by thyroid is absorbing in 6 to 24 hours is measured and compared with normal measurements. This result expresses the hormone synthesis by the thyroid gland.
Liver and Spleen scans: The visual examination of the liver and spleen using Technetium-99m and sulfur colloid is brought in through an injection via the intravenous route and the pictures are documented using a gamma camera. Areas of tumor or abscesses are shown as blank spots as they have a reduced uptake of the radiopharmaceutical substance. Tumors, blood clots, cirrhosis, liver swelling, swelling of spleen due to cancer or cysts or abscesses, or any cracks in them can be visual documented using this scan.
Gallium scan: The radioisotope called gallium-67 is brought in through an injection and has a resemblance for tumors and non-neoplastic lesions, for example abscesses.
SPECT or Single Photon emission computed tomography scan: This technique engrosses an intravenous injection of radioactive tracing substance and the computer reconstruction of a three-dimensional image from the composite of many views. Clinical applications include detecting liver tumors, detecting cardiac ischemia, and evaluating bone disease of the spine.
In the next post we will learn about Radiation Therapy to cure cancer. Okay.
Come on.
To go to the next lesson from here please click the link below.
Home Page: http://learn-free-medical-transcription.blogspot.com
