A 30-year-old member asked:
Disclaimer

when having a pet scan, is the ct scan that used in conjunction good enough to diagnose all tumors?

3 doctor answers
Dr. Dan Fisher
26 years experience Internal Medicine
No.: The ct is not good enough. When it is combined with the pet scan it is very good.
Answered on Jul 12, 2012
Dr. Garry Choy
15 years experience Radiology
Good but not all: It is good to have ct in conjunction with pet scan because ct provides more resolution. It helps the radiologist correlate signals seen on pet scan with actual anatomy precisely. However, no test is perfect, so pet/ct is not able to diagnose all tumors. But pet/ct can diagnose many types.
Answered on Sep 28, 2016
3
3 thanks
Dr. Gerald Mandell
51 years experience Nuclear Medicine
Not always: Usually CT associated with PET varies in resolution. Higher resolution usually more radiation dose to patient. Usually resolution good enough to localize structure causing increased metabolism. Usually associated CT is without intravenous contrast. PET can localize lesion for biopsy or surgery. If more detail needed once lesion localized many times MR for tissue characteristics is usualized
Answered on Nov 22, 2014

90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more. Get help now:

Ask doctors free
Personalized answers
Free
Talk to a doctor
Unlimited visits
$10/month

Related questions:

A 38-year-old female asked:
Dr. Sewa Legha
49 years experience Medical Oncology
May be benign tumor: PET scan shows the degree of metabolic activity and the CT shows the dimensions of the lesion that is producing metabolic activity(or lacking it.). I ... Read More
A 39-year-old female asked:
Dr. Gurmukh Singh
48 years experience Pathology
Depends: If it is a tumor of the bone, an x-ray be sufficient. It would better to let your doctor decide. Wish you good health! - Have a diet rich in fresh veg ... Read More
1
1 comment
1
1 thank
A 66-year-old female asked:
Dr. Michael Gabor
32 years experience Diagnostic Radiology
The substances used: in PET are radioactive tracers that accumulate to varying degrees in sites of metabolic activity. Cancers typically have altered/increased metabolic ... Read More
1
1 thank
A 62-year-old male asked:
Dr. Laurie Harrell
29 years experience Radiation Oncology
Better images: In very general terms: Cancers use glucose (sugar) faster than normal tissue. PET imaging provides diagnostic information based on increased glucose u ... Read More
2
2 thanks

90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more. Get help now:

Ask doctors free
Personalized answers
Free
Talk to a doctor
Unlimited visits
$10/month