gantry: ( gan'trē ), A frame housing the x-ray tube, collimators, and detectors in a CT machine, with a large opening into which the patient is inserted; a mechanical support for mounting a device to be moved in a circular path. [M.E., fr. O.Fr., fr. L. cantherius, wooden frame, fr. G. kanthēlia, pack saddle, fr. kanthos, pack ass]