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Doctor insights on: What Can A Pet Scan Show

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What can a pet scan show?

What can a pet scan show?

What is the question: Currently pet scans are widely use for evaluation of glucose metabolism in the body. In oncology, is use to for initial metabolic characterization of tumors, metastases as well as for treatment response and surveillance. In cardiology, pet scans are use to assess heart ischemia and viability and in neurology the study is use to evaluate cognitive disorders, epilepsy and brain tumors ...Read more

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Dr. Guido Davidzon
274 doctors shared insights

Pet Scan (Definition)

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


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Should a pet scan show any cancer?

Should a pet scan show any cancer?

Glucose: Pet scan relies on the theory that tumors utilize a significant amount of glucose. Many different types of cancer can show up on pet scan but certain types of cancer are much more FDG avid. Low grade tumors usually have much less uptake than high grade tumors. In addition, mucinous neoplasms often do not have much FDG uptake. Small size tumors or micrometastases also may not show up on pet. ...Read more

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Why would a pet scan show hyperactivity in an area in the colin where i had a polyp removed 2 months prior?

Why would a pet scan show hyperactivity in an area in the colin where i had a polyp removed 2 months prior?

Possibly: Pet/ct scans with FDG localize areas with increased glucose metabolism. Although this can be some types of cancer, it also can be due to infection, inflammation and healing wounds. ...Read more

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What would a PET scan show that a CT scan may not for a person with pancreatic cancer?

What would a PET scan show that a CT scan may not for a person with pancreatic cancer?

PET in cancer: PET scans are used to detect areas of abnormally increased metabolism, while CT scans only detect areas of differing density or lucency to radiation. So an abnormality like an area of scarred old tumor might look abnormal on CT scan but not have increased metabolism indicating active cancer on PET scan. False positives still occur with both, but they tend to commplement each other. ...Read more

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What part of the body does a whole pet scan show?

What part of the body does a whole pet scan show?

Eyes to thighs: Even though the study is called whole body pet/ct, most often the image acquisition is from the eyes to thighs. The parts of the body that are included varies from center to center and also depends on the patient's symptoms and cancer histopathology. For e.g. Melanomas can metastasize anywhere in the body and thus real whole body scans are obtained (skull vertex to toes). ...Read more

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What shows up on pet scan but not on cat scan?

What shows up on pet scan but not on cat scan?

Glucose metabolism: PET with F18 FDG, glucose metabolite, determines glucose metabolism of normal and abnormal structures.For example, sometimes lymph nodes are visualized on CT and do no know whether benign or malignant. In general malignant lesions are more active and have higher metabolism of glucose ...Read more

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Are small liver nodules less than 1cm cancer, didn't show on pet scan?

Are small liver nodules less than 1cm cancer, didn't show on pet scan?

Need more info: I would say unlikely if pet/ct liver was negative, but i need to know more about your mediacl history and other tests/treatments you may have had. ...Read more

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Does a whole body pet scan show the brain?

Does a whole body pet scan show the brain?

If it is included: The drug given goes everywhere in the body, including the brain. How much of the body that is imaged depends on the disease being looked for. For lymphoma, scans start at the base of the brain and end at the upper thighs. For head and neck cancer, the scan is from the top of the head to the upper thighs. Melanoma includes the whole body, and seizures is just of the brain. ...Read more

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