发明名称 |
RECONSTRUCTION METHOD OF PROJECTION DATA SET DURING DOSE REDUCED PARTIAL SPIRAL SCANNING OF REDUCED RADIATION DOSAGE IN COMPUTERIZED TOMOGRAPHY |
摘要 |
PROBLEM TO BE SOLVED: To enable exact reduction of a dose for an organ especially sensitive to X-rays. SOLUTION: A radiation beam transmitted from a tube current given radiation source (7) comes in a detection system and the detection system supplies scan data. A computerized tomography device acquires two and three dimensional scan images of an examination object (1) by an image calculation device based on the scan data. In a reconstruction method of a projection data set imperfect upon partial scanning wherein a dose is reduced in the computerized tomography device, when a z-position has one or more pitch and imperfect projection data set, data in a line other than the projection and/or a projection data set with advancing or following 360°rotation data are used in a pre-process for reconstruction of such a z-position spiral scan along the z-axis of a patient (1) on a z-direction movable table (2) is carried out by the computerized tomography device by a computerized tomography device. COPYRIGHT: (C)2006,JPO&NCIPI
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申请公布号 |
JP2005312970(A) |
申请公布日期 |
2005.11.10 |
申请号 |
JP20050129131 |
申请日期 |
2005.04.27 |
申请人 |
SIEMENS AG |
发明人 |
KALENDER WILLI;SCHALLER STEFAN;SCHMITT BERNHARD |
分类号 |
A61B6/03;A61B6/06;G01T1/29;G01T1/36;G06T17/00;G21K1/12;(IPC1-7):A61B6/03 |
主分类号 |
A61B6/03 |
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主权项 |
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地址 |
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