Abstract: A magnetic resonance imaging system includes a cylindrical magnet with a detection system for eliciting nuclear magnetic resonance signals where the magnet is mounted on a support undercarriage for movement relative to the floor. This can include drive tracks on respective sides of the magnet for forward, rearward and turning movement relative to a patient table or can include guided wheels/rollers. A separate lifting system is provided, including compressed air casters or magnetic lift, for lifting the tracks up from the floor. In one arrangement the tracks form the primary support and the lift system acts to allow the magnet to be moved relative to the floor independently of the drive control system. In another arrangement the magnet is lifted primarily by the float and the tracks and/or rotatable drive wheel or roller engaging the floor are used for guiding and steering the support system and the magnet across the floor.

Abstract: Apparatus for radiation therapy combines a patient table, an MRI and a radiation treatment apparatus mounted in a common treatment room with the MR magnet movable from a position outside a radiation shielded door to an imaging position. An RF-shielded door is movable between a position, separating part of the treatment apparatus from the magnet and an open position allowing access of the patient to the treatment apparatus. In one configuration there is a row of treatment rooms and the magnet is mounted to move along a passageway outside the row of radiation shielded doors of the rooms.

Abstract: Apparatus for radiation therapy combines a patient table, an MRI and a radiation treatment apparatus mounted in a common treatment room with the MR magnet movable from a position outside a radiation shielded door to an imaging position. An RF-shielded door is movable between a position, separating part of the treatment apparatus from the magnet and an open position allowing access of the patient to the treatment apparatus. In one configuration there is a row of treatment rooms and the magnet is mounted to move along a passageway outside the row of radiation shielded doors of the rooms.