| 摘要 |
<p>According to the present invention, data of arbitrary penetration thickness can be easily obtained in carrying our a beam hardening calibration.. A center tomographic image reconstructed parallel to a center line of a projection data of a water phantom and an X-ray tube is read from an image data server. The read center tomographic image is two-dimensionally modeled on a circle. A radius and a center coordinate of the circle on which the image is two-dimensionally modeled are used to re-arrange the X-ray tube, the sensor, and the modeled circle.
Points of intersection A and B of the re-arranged circle and a path along which the X-rays reach the sensor from the X-ray tube are determined to obtain a penetration thickness of the water phantom based on the points of intersection A and B. Accordingly, in order to determine an attenuation property when the X-rays are penetrated through a subject, a larger quantity of data of an output value of a sensor with respect to the penetration thickness is gathered with ease.</p> |
