What is the purpose of octreotide scan?
A type of radionuclide scan used to find carcinoid and other types of tumors. Radioactive octreotide, a drug similar to somatostatin, is injected into a vein and travels through the bloodstream. The radioactive octreotide attaches to tumor cells that have receptors for somatostatin.
How long does it take to have an octreotide scan?
This scan takes about 20 minutes. These images will be shown to the radiologist and the radiologist will determine if another set of images is needed on this day. If needed, the technologist will take another set of images called a SPECT/CT.
What is the difference between a PET scan and an octreotide scan?
Conclusions Ga PET/CT is more accurate for staging and superior to Octreoscan SPECT in the detection of overall number of lesions in the body as well as organs and bones. Ga PET/CT also allows for calculation of standardized uptake value, has less whole body radiation, and is performed in less time versus Octreoscan.
How accurate is octreotide scan?
Octreotide scans are reported to have a sensitivity between 75 percent and 100 percent for detecting pancreatic neuroendocrine tumors.
How do you prepare for Octreoscan?
Drink plenty of fluids before and throughout this scan, and up to 1 day after having the scan. This encourages the elimination of the radioactive material that is not absorbed by the body and is also useful for taking clearer images.
Where are neuroendocrine tumors found?
Neuroendocrine tumors are rare and can occur anywhere in the body. Most neuroendocrine tumors occur in the lungs, appendix, small intestine, rectum and pancreas.
Do carcinoid tumors show up on a PET scan?
This type of PET scan is not very useful in finding atypical carcinoid tumors, but a newer type of PET scan called a gallium-68 dotatate PET/CT scan is being used more often for typical carcinoid tumors. It uses the radioactive agent 68Ga-dotatate which attaches to the somatostatin receptors on carcinoid cells.
Do neuroendocrine tumors show up on a PET scan?
NETs can be very small and develop anywhere in the body, such as the stomach, intestines, pancreas and lungs. And because they don’t show up on typical PET scans, finding them at early stages or detecting metastasis is difficult.
Where is a neuroendocrine tumor located?
What is an octreotide scan used to evaluate?
An octreotide scan is used to evaluate the neuroendocrine system and involves three to four visits to the nuclear medicine department. On your first visit, the nuclear medicine technologist will review your health information and then inject a small amount of radioactive tracer into a vein in your arm.
Can you stop octreotide therapy for a CT scan?
If you are currently on octreotide therapy or certain other medications (e.g. somatostatin), you may be required to stop treatment temporarily for the scan. The safety and duration of stopping treatment will be discussed with your doctor and the nuclear medicine physician in consultation with you.
What is indium-111 pentetreotide scan?
An octreotide scan may be used to locate suspected primary neuroendocrine tumours (NET) or for follow-up or staging after treatment. The Indium-111 pentetreotide radiopharmaceutical is prepared from a kit in a radiopharmacy. Pentetreotide is a DTPA conjugate of octreotide. Approximately 200 megabecquerels of Indium-111 is injected intravenously.
What is the DTPA conjugate of octreotide?
Pentetreotide is a DTPA conjugate of octreotide. Approximately 200 megabecquerels of Indium-111 is injected intravenously. Imaging takes place 24 hours after injection, but may also be carried out at 4 and 48 hours.
