| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To acquire the positional relationship between an X-ray tube and a detector, the positional relationship between the X-ray tube and a reference tomographic plane and a parameter such as an X-ray projection direction to easily grasp the positional relationship between them in an imaging space at every radiation imaging apparatus. <P>SOLUTION: In the radiation imaging apparatus, a phantom (171) for calibrating a parameter for defining the imaging space including the three-dimensional position of the reference tomographic plane is used. Radiation is discharged from a radiation source where the phantom is arranged in the imaging space to collect data and an image for calibration is formed on the basis of the data. Further, the parameter is calibrated on the basis of the data of known amount possessed by the phantom and the projection position data of the phantom obtained from the image for calibration. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
