Depends on the scan. The spiral CT I just had required fasting for 12 hours. PET scans also have specific fasting requirement requirements (and you certainly want to limit your sugar intake before one), as well as MRI's. Always ask the RO - sometimes they just assume that you already know.

Some blood work is the same - Cholesterol tests require a 12 hour fast.

Some institutions are terrible about providing pertinent patient instructions.


Gary Allsebrook
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Dx 11/22/02, SCC, 6 x 3 cm Polypoid tumor, rt tonsil, Stage III/IVA, T3N0M0 G1/2
Tx 1/28/03 - 3/19/03, Cisplatin ct x2, IMRT, bilateral, with boost, x35(69.96Gy)
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"You are a mist that appears for a little while and then vanishes" (James 4:14 NIV)