POSITION JUDGEMENT SYSTEM AND METHOD

摘要

PURPOSE: To accurately match the coordinate system of a patient's cranial bones and the coordinate system of diagnosis data. CONSTITUTION: A patient's head is fixed to one end of a patient support part 10, and a receiver array is fitted to a frame 12 fixed to the patient support part. At least one reference transmitter is placed on the frame. At least two ejection parts 44, 46 are fitted to a stick member. The relative transit time of a signal from the ejection part to the receiver array, and the transit time is compared with the transit time in the known distance from a reference transmitter to one or more receivers to determine 80 the position of the stick member in the coordinate system of the patient support part. Three-dimensional array of diagnostic image data is taken in a patient's fixing position, and at least three markers 14 are fixed to the patient.