Abstract: In a stowed configuration, a gantry (32) of a CT scanner is mounted by helical, wire rope shock isolators (78) to a floor (12) of an ISO shelter at about a 60.degree. angle relative to a central axis (48) of the shelter. Mechanical assemblies (84, 100) limit movement of a tiltable gantry portion (82) relative to fixed gantry portions (60, 62, 64). A CT scanner control console (36) is mounted adjacent an opposite end of the ISO shelter on shock isolators (140). A patient couch (34) is mounted on shock isolators (122) in a stowed configuration in the available space between the gantry and the console. To deploy the system, foldable walls (26, 30), a foldable ceiling panel (28), and a foldable floor panel (24) of the ISO shelter are folded out. The patient couch is lowered onto casters (124) and moved into alignment with a central axis of the gantry. Jacks (128, 130) lower the patient couch from the casters and shock isolators onto the floor of the ISO shelter for fixed engagement.