Abstract: A device for accurately locate the tumor in a radiation therapy machine (RTM) based on the patient's CT image is disclosed. The device immobilizes a patient in a repeatable location when a CT scan is made and the radiation therapy is given. The device includes a base plate to support the patient, on which there are: a pair of pins to constrain the armpits of the patient, a pair of shoulder pads to constrain the shoulders of the patient, a headrest and head pads to constrain the head of the patient, markers, and a jaw restrainer secured to the head pads. Coordinate transformations will be used to locate the tumor in the RTM.

Abstract: A body-support frame comprising a horizontal table having two adjustable ces that can be moved along the main axis of the table for straddling a patient lying within the frame. Each brace is equipped with a swiveled clamp attached to an adjustable system of bracket-arms for the skeletal fixation and immobilization of the patient craniad and caudad to the area of interest. The frame contains orthogonal scales for orthogonal localization and measurements of the area of interest with reference to a chosen set of coordinates within the table. The frame also contains three adjustable radiographic calibration targets that are used for selectively setting a plane of reference in the proximity of the area of interest, so that the plane may be used for lining up the frame with radiographic imaging and radiation treatment apparatus.