发明授权
- 专利标题: Method of calibrating a radiological system and of measuring the equivalent thickness of an object
- 专利标题(中): 校准放射学系统和测量物体的等效厚度的方法
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申请号: US979471申请日: 1992-11-20
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公开(公告)号: US5528649A公开(公告)日: 1996-06-18
- 发明人: Robert Heidsieck
- 申请人: Robert Heidsieck
- 申请人地址: FRX Issy les Molineaux
- 专利权人: General Electric CGR SA
- 当前专利权人: General Electric CGR SA
- 当前专利权人地址: FRX Issy les Molineaux
- 优先权: FRX8907686 19890609
- 主分类号: A61B6/00
- IPC分类号: A61B6/00 ; G01N23/08 ; G01N23/06
摘要:
The calibration method consists in measuring the efficiency D of a detector cell placed behind the object as a function of various phantom thicknesses E.sub.p and various X-ray tube supply voltages V.sub.m. These measurements enable an analytic model D=f(V.sub.m, E.sub.p) to be determined describing the resulting curves. The inverse function of this analytic model can be used for calculating thickness E.sub.p as a function of the measured efficiency D and the known supply voltage V.sub.m.
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