5. Metal implants or paramagnetic objects contained within the body which may interfere with the MRI scan, as determined in consultation with a neuroradiologist and according to the guidelines set forth in the following reference book commonly used by neuroradiologists: "Guide to MR procedures and metallic objects" Shellock, PhD, Lippincott-Raven press, NY 1998.14. This includes metal or shrapnel or bullet in the head or body, including metal shavings.