Good luck to your brother with his PET/CT scan tomorrow! He should be sure to follow his PET/CT instructions closely so that a good, clean scan image is produced thereby allowing the surgeon to accurately evaluate the feasibility of Cyto-Reductive Surgery (CRS). He should be sure not to wear any clothes with metal buckles, metal clasps, metal eyelets, metal zippers, etc., because they might cause problems with the CT scan part of the procedure. Also, he should try not to fidget or move around during the PET part of the procedure because that might blur or displace the nodule images.
Preparing for your PET/CT scan
https://www.dana-farber.org/health-library/articles/preparing-for-your-petct-scan/
Preparing for Your PET-CT Scan
https://www.cancer.net/blog/2019-04/preparing-your-pet-ct-scan
PET/CT Scan: How to Prepare, What to Expect & Safety Tips
https://radiology.ucsf.edu/patient-care/prepare/pet-ct
How to prepare for a PET scan
https://www.envrad.com/how-to-prepare-for-pet-scan/
PET scan patient instructions
https://www.craimaging.com/media/acoflun1/pet-patient-instructions.pdf