Hi, MRI safety manual says that whenever you are scanning a patient with a certain surface coil you should remove all unplugged coils from the bore during the scan. For example, if you have a head/neck + spine coil matrix with two coil ports and you are scanning only the spine part then you should either connect the head part also or remove head/neck coil from the bore. I was wondering what is the physical mechanism that can cause patient burns? For example, if you scan patient's spine and leave the head coil unplugged. I was thinking in the lines that somehow when the patient is in contact with the unplugged coil it could create a conducting loop between the unplugged coil, patient, patient table maybe and when this loop is in a RF field it causes current to flow in that loop that could cause burns to the patient.