- Have any ferrous or electrical items or non-removable medical devices that are not compatible with MR scanning (including devices labelled as MR Unsafe, MR conditional for which the scanning conditions are not met, or without MR safety labelling that does not satisfy site MR safety requirements) that may pose hazards in the MR scanning or MR environment, in the opinion of the Principal Investigator or medically qualified personnel in accordance with the site's MR Safety policy;