| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a technique which obtains highly accurate sensitivity information from a gain calibration image without moire component (grid stripe) to improve image quality of an X-ray image to be finally obtained in an X-ray image diagnostic apparatus provided with a grid oscillation mechanism.SOLUTION: In an image acquired at the time of gain calibration, existence of a stripe of a grid (grid stripe) is determined. Only the image without the grid stripe is used in a gain calibration image. The determination of the existence of the grid stripe is performed in accordance with image processing on the acquired image or relative position between an X-ray plane detector and a grid at the time of image acquisition.</p> |
