发明名称 |
X-ray CT system with means to expand detector signals by interpolation before filter processing is performed |
摘要 |
In an X-ray CT apparatus including an X-ray source for irradiating X-rays to an object to be tested; a radiant ray detector for detecting the amount of X-rays transmitted through said object to be tested; a device for rotating the X-ray source and the detector about an axis to produce detection signals corresponding to the amount of transmitted X-rays; a filter for filter processing the detection signal; circuitry for back-projecting the filtering resultant to thereby reproduce a distribution image of X-ray absorption in a cross-section of the object to be tested, and a device for interpolating interpolation values into the detection signals to form expanded signals having an elongated length so that the expanded signals are used for the filter processing.
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申请公布号 |
US4740896(A) |
申请公布日期 |
1988.04.26 |
申请号 |
US19850776473 |
申请日期 |
1985.09.16 |
申请人 |
HITACHI MEDICAL CORPORATION |
发明人 |
HORIBA, ISAO;IWATA, AKIRA;SASAKI, HIROSHI;SATO, KAZUHIRO |
分类号 |
G01N23/04;A61B6/03;G06T1/00;G06T11/00;(IPC1-7):G06F15/42;A61B6/02;G06K9/46 |
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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