A 28-year-old male asked:
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what is the definition or description of: pet-ct lung cancer diagnosis?

4 doctor answers
Dr. Martin Rubenstein
44 years experience Hematology and Oncology
Imaging test.: A pet/ct is a combined whole body x-ray (ct scan) and a functional image based on how much sugar is taken up in various parts of the body. It is not a way of diagnosing lung cancer, which requires a biopsy, but it can help deciding if a biopsy is needed. A lung nodule on x-ray may be benign or cancerous. If that nodule takes up a lot of sugar on pet, it is more likely to be cancer.
Answered on Aug 25, 2017
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3 thanks
Dr. Steven Guyton
45 years experience Thoracic Surgery
Combination: Pet-ct uses a combination of x-rays and a scan for metabolic activity to be more sensitive than either alone. Ct can show the size and shape of structures or masses within the chest. Pet detects increased metabolic activity associated with an infection or a growing cancer. Correlation of the two tests together is more accurate than either one alone.
Answered on Aug 22, 2013
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Dr. Craig Carter
39 years experience Thoracic Surgery
Clinical: Lung cancer is diagnosed by obtaining tissue from somewhere. This would be a pathologic diagnosis. Cancer can be inferred by by various imaging studies, but positive studies need to be confirmed by tissue diagnosis. There are false positive and false negative results with any diagnostic study.
Answered on Feb 10, 2013
Dr. Loki Skylizard
19 years experience Thoracic Surgery
No such thing: Pet scan identifies increased cellular metabolism. The suv is a measure of how metabolically active a "spot" or "nodule" is. It does not diagnose. Lung cancer (all cancers) is diagnosed by obtaining tissue and examining by pathologist. Any lung nodule must be thoroughly investigated and closely followed by a comprehensive thoracic team.
Answered on Jul 28, 2014
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Related questions:

A 43-year-old female asked:
Dr. Gurmukh Singh
48 years experience Pathology
PET may help: Pet scan is likely to be helpful. The nodule may be an old scar and may not light up on pet. If it lights up on pet, additional investigation, includi ... Read More
1
1 thank
A 33-year-old male asked:
Dr. Steven Chmielewski
29 years experience Diagnostic Radiology
Inflammatory nodules: However, an suv of greater than 2.5 is considered suspicious and that nodule should be biopsied.
1
1 thank
A 43-year-old female asked:
Dr. Steven Hebert
28 years experience Pathology
PET scan: Tumors generally have a higher metabolic rate and a pet ct make use of this. Tumor usually lights up on a pet scan. If the tumor nodule is very smal ... Read More
2
2 thanks

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