TOMOGRAPHY DEVICE CALIBRATION METHOD AND TOMOGRAPHY IMAGE SUPERPOSITION METHOD

摘要

[PROBLEMS] To convert position data corresponding to tomogram data acquired from a tomography device into position data of a common coordinate system between different tomography devices and superimpose the data. [MEANS FOR SOLVING PROBLEMS] An optical tracking device (3) is prepared and a marker (4) which can be detected by the tracking device is mounted on a gantry (1). A calibration jig having a similar marker (61) and a ray source (62) which can be detected by a gantry detector is held by a holding device (2). Position data on the both markers (4, 61) when scan is performed are acquired by the tracking device so as to obtain a transformation matrix T_G?P for converting the position data of the gantry coordinate system C_G into position data of the scanner coordinate system C_P of the tomography device. Images having position data of the scanner coordinate system C_P are superimposed on each other.