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Pet Scan Accuracy Cancer Detection
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Pet scans most often use a radioactive form of glucose, the energy source for most of the cells in our bodies. The pet scanner can detect and measure how much of the radioactive glucose analog, f-18 fdg, is in a particular organ or region. The areas using more glucose are hyper metabolic and generally more worrisome. Our brains and sometimes hearts prefer glucose as food, making ...Read more
Yes and no: Areas with cancer are usually hypermetabolic in a pet scan due to the increased uptake of the radioactive glucose by cancerous cells. Looking at an FDG pet scan alone, you can grossly see "dark" areas in the brain, heart, kidneys and bladder and these are due to physiologic distribution/excretion of fdg. Not all "dark" is cancer and cancer is often but not always "dark". ...Read moreSee 2 more doctor answers
Yes: Not every cancer should be followed with pet/ct. But when the cancer is visible by this technology, it is often helpful in treatment planning and follow up. Here is link: http://www.Petscaninfo.Com/zportal/portals/pat/cancer. ...Read moreSee 2 more doctor answers
PET is not 100%: The distribution and intensity of hyper-metabolic activity appearance on a pet/ct scan could be abnormal and may represent malignancy but is not pathognomonic and may also represent inflammation, infection or granulomatous disease. If biopsy is correctly done, results of direct tissue are usually more certain. However, short interval follow-up with pet/ct is often recommended. ...Read moreSee 1 more doctor answer
Oncology: I've been told by a layperson that a PET scan is able to detect the presence of even a couple of dividing cancer cells. I think not. Right?
Uptake on PET: The uptake of 18F-FDG by tissues is a marker for the tissue uptake of glucose, which in turn is closely correlated with certain types of tissue metabolism. Tumors in general are more metabolically active than normal tissues and this difference in uptake is what makes PET scans possible. Tumors that have a higher metabolic rate will have more FDG uptake. Tumors that are less active havel less . ...Read moreSee 1 more doctor answer
Is it better that the SUV Max on a pet scan is lower than higher? Does this mean the cancer Is less aggressive and less active
What is the highest it can be !
PET & SUV: most PET scans have a range of SUV that goes from 0 to 4, which is felt to be less likely malignant. The SUV above 4 is more suspicious of cancer. PET scans pick up spots where the tissues are using more energy...like infections, surgery sites, and cancers. There really is no upper limit. If your SUV is declining this usually means the cancer is responding or dying off. ...Read more
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