Basically every time we perform a PET/CT scan, there are a few questions we like to ask the patient. Namely whether if they are a diabetic, and if they are, what time did they take their insulin or hyperglycemic medication. The other thing is, have they eaten anything within the past 6 hours. Given the image above, what do you think happened? Does this look like a typical PET scan using F18-FDG?
Indication: Thyoma PET study
Findings: Paitent did not prepare for the PET/CT examination, a follow up study is required.
Hx: The thyoma study requires the patient to undergo presurgical radiation therapy and chemotherapy, in the attempt to increase the chances of a complete resection. The PET/CT scans are done prior to the chemo and radiation therapy and then post surgery. The PET scans are performed 3-4 weeks post treatment to avoid reactive responses causing false positive scans.
With this case, the PET/CT scan was performed post surgery. The patient during the screening process denied eating prior to the test. The blood glucose measurement did not suggest otherwise, however upon completion of the exam, the image included vast muscular uptake. The patient confessed in having a coffee and a muffin 1 hour prior to his PET/CT injection.
Three days after the scan above, another PET/CT scan was performed. Compare the difference. It's not great but definitely improved.
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