Hello, that you for your question about what type of scan is best to evaluate silicone injections. The best radiographic study for silicone injections is a MRI. The MRI should be performed with and without contrast. This allows your plastic surgeon to see where the silicone, scar tissue, and granulomas exactly are located. I specialized in biopolymer and silicone removal and subsequent reconstruction. Since removing biopolymer and silicone is a big procedure, please seek an experienced, board certified plastic surgeon with significant experience in removing silicone from the buttock. Do your research. Make sure they have performed at least 100 biopolymer and silicone removal surgeries and have the before and after pictures to prove it. Carefully examine their before and after pictures and check their reviews on RealSelf. If you cannot find an experienced, buttock silicone removal surgeon in your neighborhood, consider traveling out of state if you must. Sincerely, Dr. Katzen. (“Verified” Plastic Surgeon, President of the American Society of Bariatric Plastic Surgeons, Certified by the American Board of Plastic Surgery, Fellow of the International Society of Aesthetic Plastic Surgery, American College of Surgery, and International College of Surgery and member of the American Society of Plastic Surgery, American Academy of Cosmetic Surgery and RealSelf Hall of Fame.)