FRAME FOR STEREOTACTIC RADIO THERAPY FOR BRAIN SPECIFICALLY EXPECTED TO OBTAIN MRI IMAGE WITHOUT DISTORTIONS

摘要

PURPOSE: A frame is provided to prevent interferences during photographing, and obtain MRI images with no distortion by avoiding disturbance of magnetic field during operation of MRI. CONSTITUTION: A frame(10) comprises a frame circle(17) shaped as a ring having a predetermined inner diameter and a predetermined outer diameter, wherein the frame circle is fixed on a table(11) and permits the head of a patient to pass through the frame circle; a plurality of support bars(23) arranged in the frame circle in such a manner that the support bars are accessible/separable to/from the head of a patient; a pin holder mounted on the support bars in such a manner that the pin holder is movable in the movement direction of the support bars, wherein the pin holder has a fixing pin(25) for fixing the head of the patient with respect to the support bars; and a support bar driving unit for controlling position of the support bars with respect to the head of the patient by controlling the support bars.