发明名称 |
X-RAY CT APPARATUS AND IMAGING METHOD WITH X-RAY CT APPARATUS |
摘要 |
The X-ray intensities of a number of cross sections are detected by detector (3) and an X-ray intensity differentiating unit (8) calculates a rate of change of the X-ray intensity in the direction perpendicular to a slice surface. The rate of change is calculated for X-ray intensities measured at all irradiation angles by all the radiation detectors constituting the detector (3). In order to correct the nonlinear partial volume effect, the measured X-ray intensity is corrected in X-ray intensity correcting unit (9) based on said rate of change. Then a CT image is reconstructed using the corrected intensity values in CT image calculating unit (10). Hence, the reconstructing unit (4) comprises X-ray intensity correcting unit (9) as a preprocessing unit of the CT image calculating unit (10). <IMAGE> |
申请公布号 |
KR20050037955(A) |
申请公布日期 |
2005.04.25 |
申请号 |
KR20040083360 |
申请日期 |
2004.10.19 |
申请人 |
KABUSHIKI KAISHA HITACHI SEISAKUSHO(D/B/A HITACHI, LTD.) |
发明人 |
ABE, YUTAKA;KITAZAWA, SO;TAKAGI, TARO |
分类号 |
G01N23/04;G06T11/00;(IPC1-7):G01N23/04 |
主分类号 |
G01N23/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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