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AssigneeCanon Kabushiki Kaisha
InventorsHiroyuki Oumi, Hiroyuki Urushiya
Estimating the term…
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.
An information processor, comprising:
An absorption coefficient calibration method, comprising the step of:
A computer program for causing a computer to execute the step of:
Dependencies are inferred from the claim text.