9 doctors weighed in:
What's the difference between CT scanning and pet scanning?
9 doctors weighed in

Dr. Michael Gabor
Diagnostic Radiology
2 doctors agree
In brief: CT/PET
CT uses X-rays to produce images.
The radiation passes through the body into detectors. With PET, a radioactive labelled substance, usually glucose, is injected into the body. Glucose is metabolically active, so PET forms functional images based on areas of high metabolic activity. CT images anatomic structure. Sometimes the 2 are combined, called PET/CT fusion imaging.

In brief: CT/PET
CT uses X-rays to produce images.
The radiation passes through the body into detectors. With PET, a radioactive labelled substance, usually glucose, is injected into the body. Glucose is metabolically active, so PET forms functional images based on areas of high metabolic activity. CT images anatomic structure. Sometimes the 2 are combined, called PET/CT fusion imaging.
Dr. Michael Gabor
Dr. Michael Gabor
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Dr. Ibrahim ElGendy
Internal Medicine
1 doctor agrees
In brief: Here.
A computerised tomography (CT) scan uses X-rays and a computer to create detailed images of the inside of the body.
Positron emission tomography (PET) scans are used to produce detailed three-dimensional images of the inside of the body. Before you have a PET scan, a radioactive substance (a radiotracer) will be passed into your body. This is usually by injection into a vein.

In brief: Here.
A computerised tomography (CT) scan uses X-rays and a computer to create detailed images of the inside of the body.
Positron emission tomography (PET) scans are used to produce detailed three-dimensional images of the inside of the body. Before you have a PET scan, a radioactive substance (a radiotracer) will be passed into your body. This is usually by injection into a vein.
Dr. Ibrahim ElGendy
Dr. Ibrahim ElGendy
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Dr. Felix Brizuela
Neurology
1 doctor agrees
In brief: Radiation
Pt scan uses radioactive glucose that is injected.
The glucose is taken up by organs for energy, and we measure how active the tissue is. Dead tissue, like a stroke takes up no glucose. Cancer takes up too much. Ct only takes a picture.

In brief: Radiation
Pt scan uses radioactive glucose that is injected.
The glucose is taken up by organs for energy, and we measure how active the tissue is. Dead tissue, like a stroke takes up no glucose. Cancer takes up too much. Ct only takes a picture.
Dr. Felix Brizuela
Dr. Felix Brizuela
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Dr. Gerald Mandell
Nuclear Medicine
In brief: Anatomy / metabolism
CAT scan utilizes xrays for determination of anatomical structures in multiple planes coronal, sagittal, and transaxial.
PET scan uses radioactivity with tracer FDG 18 a glucose metabolite to show metabolic areas . Usually malignant lesions are most active. Small metastatic lesions can be detected. Sometimes compared with anatomy with PT CT.

In brief: Anatomy / metabolism
CAT scan utilizes xrays for determination of anatomical structures in multiple planes coronal, sagittal, and transaxial.
PET scan uses radioactivity with tracer FDG 18 a glucose metabolite to show metabolic areas . Usually malignant lesions are most active. Small metastatic lesions can be detected. Sometimes compared with anatomy with PT CT.
Dr. Gerald Mandell
Dr. Gerald Mandell
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Dr. Michael Korona
Radiology - Interventional
In brief: See
Radiologyinfo.Org.

In brief: See
Radiologyinfo.Org.
Dr. Michael Korona
Dr. Michael Korona
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