X線診断装置
- 专利权人:
- 株式会社日立メディコ
- 发明人:
- 竹之内 忍,鈴木 克己
- 申请号：
- JP2008191661
- 公开号：
- JP5362282B2
- 申请日:
- 2008.07.25
- 申请国别(地区):
- JP
- 年份:
- 2013
- 代理人:
- 摘要：
PROBLEM TO BE SOLVED: To provide an X-ray diagnostic apparatus which detects an obstacle located within an X-ray irradiation region when acquiring sensitivity information of an X-ray detector.
SOLUTION: When acquiring sensitivity information of the X-ray detector 5, a control section 61 performs Fourier transformation on X-ray detection data (p15) extracted from lines diagonal to grid stripes and having an amount of one column, among X-ray detection data acquired by air photography, and converts the data into frequency space. When a peak appears in frequency response (p17), the control section determines that an object is detected within the X-ray irradiation space. Because a frequency range where a peak may appear can be estimated in advance from a moire frequency characteristics generated by gaps between the grid space and the sampling pitch, the control section 61 detects presence or absence of a peak by searching the estimated region. When a peak is detected within the estimated region, the control section 61 determines that the grid 4 is inserted and issues an alarm showing detection of the grid 4.
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- 来源网站：
- 中国工程科技知识中心
