Lindgren RF Enclosures, Inc, Glendale Heights, Ill, offers the Sliding Shielded Door (SSD) for MRI applications. The SSD is available as a single or double door, measuring 4 feet wide x 7 feet high and 8 feet wide x 7 feet high respectively. The SSD was developed for surgical MRI in which automatic door operation and a sterile environment are required. (630) 307-7200;