发明名称 |
METHOD FOR RECONSTITUTING IMAGE FROM MEASURED VALUE OBTAINED BY SPIRAL SCANNING OF EXAMINING OBJECT USING CT DEVICE AND CT DEVICE FOR EXECUTING THIS METHOD |
摘要 |
PROBLEM TO BE SOLVED: To improve the handleability of a CT device by weighting a measured value according to a weighting function corresponding to a spatial interval in the axial direction of spiral scanning from the plane of an image to reconstitute the image concerning all the measured values positioned in a longest distance from the plane of the image concerning each angle of projection. SOLUTION: This CT device is provided with an X-ray source 1 with a focal point 2, irradiates an examination object (patient) 4 with an X-ray flux 3 in the shape of a pyramid diaphragmed by a diaphragm to and detects the patient 4 and transmitting X-rays by a detector 5. The source 1 and the detector 5 are rotated around a system axis 6 so as to irradiate the objects 4 with the X-rays at uarious projection angles (a). Then, the picture is reconstituted by a computer 8 from the result of detection and concerning each angle of projection, all the measured values positioned in the longest distance from the plane of the image are weight-processed according to the weighting function corresponding to a spatial interval in the axial direction of spiral scanning from the plane of an image to facilitate the reconstitution of the picture.
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申请公布号 |
JP2000051205(A) |
申请公布日期 |
2000.02.22 |
申请号 |
JP19990199011 |
申请日期 |
1999.07.13 |
申请人 |
SIEMENS AG |
发明人 |
FLOHR THOMAS;SCHALLER STEFAN |
分类号 |
A61B6/03;G06T11/00;(IPC1-7):A61B6/03 |
主分类号 |
A61B6/03 |
代理机构 |
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主权项 |
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