Test analysis of physical precision of SGS-1 ?-knife treatment system / 医疗卫生装备

This paper is to test the physical precision of SGS-I?-knife treatment system. The total positional precision and?-treatement planning system (?-TPS) planning misdose are tested by film and ionization chamber. The precision of head target location is less than 0.88mm. The body target is less than 1.52mm. The error of single target point between the measured and the predicted doses is less than 0.52% and the error of multi target points is less than 3%. The isodose distribution (on axial plane) from the film is consistent with the predicted one. So, SGS-I?-knife can meet clinical requirements.