8 doctors weighed in:

What is the difference between a pet scan and a CT scan?

8 doctors weighed in
Dr. Guido Davidzon
Nuclear Medicine
3 doctors agree

In brief: Metabolism / Anatomy

A pet scan is an image study that assess glucose metabolism for different tissues in your body using gamma photons while a ct scan is an anatomic picture of your body that reveals size, shape and intensities of organs using x-rays.
Pet scans have several indications, including: cancer, cognitive disorders and heart perfusion stress and viability.

In brief: Metabolism / Anatomy

A pet scan is an image study that assess glucose metabolism for different tissues in your body using gamma photons while a ct scan is an anatomic picture of your body that reveals size, shape and intensities of organs using x-rays.
Pet scans have several indications, including: cancer, cognitive disorders and heart perfusion stress and viability.
Dr. Guido Davidzon
Dr. Guido Davidzon
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Dr. Carl Decker
Radiology
3 doctors agree

In brief: Usually done togethr

A pet scan measures the uptake of glucose.
The uptake of glucose is increased in most cancers. A ct scan is a basically a series of xrays over the area of interest which provides superb anatomic detail. If a ct scan picks up a mass, it may not be able to tell if it is cancerous or benign. Combining the information with the pet scan allow for superior sensitivity and specificity in detecting tumors.

In brief: Usually done togethr

A pet scan measures the uptake of glucose.
The uptake of glucose is increased in most cancers. A ct scan is a basically a series of xrays over the area of interest which provides superb anatomic detail. If a ct scan picks up a mass, it may not be able to tell if it is cancerous or benign. Combining the information with the pet scan allow for superior sensitivity and specificity in detecting tumors.
Dr. Carl Decker
Dr. Carl Decker
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Dr. Gerald Mandell
Nuclear Medicine

In brief: Anatomic/physiologic

Pet scan involves intravenous injection of radio tracer usually f18 fdg.
Imaging of whole body occurs for localization of areas of increased glucose metabolism. Malignant tumors usually most active.Ct scan involves x-ray and performs anatomic imaging of parts of body usually head, chest, abdomen, pelvis, or extremities. Pet?Ct combines imaging modalities for anatomic localization of areas of uptake

In brief: Anatomic/physiologic

Pet scan involves intravenous injection of radio tracer usually f18 fdg.
Imaging of whole body occurs for localization of areas of increased glucose metabolism. Malignant tumors usually most active.Ct scan involves x-ray and performs anatomic imaging of parts of body usually head, chest, abdomen, pelvis, or extremities. Pet?Ct combines imaging modalities for anatomic localization of areas of uptake
Dr. Gerald Mandell
Dr. Gerald Mandell
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