发明名称 X-RAY TOMOGRAPHY
摘要 <p>A fan-shaped beam of penetrating radiation, such as X-ray or gamma -ray radiation, is directed through a slice of the body to be analyzed to a position sensitive detector for deriving a shadowgraph of transmission or absorption of the penetrating radiation by the body. A number of such shadowgraphs are obtained for different angles of rotation of the fan-shaped beam relative to the center of the slice being analyzed. The detected fan beam shadowgraph data is reordered into shadowgraph data corresponding to sets of parallel paths of radiation through the body. The reordered parallel path shadowgraph data is then convoluted in accordance with a 3-D reconstruction method by convolution in a computer to derive a 3-D reconstructed tomograph of the body under analysis. In a preferred embodiment, the position sensitive detector comprises a multiwire detector wherein the wires are arrayed parallel to the direction of the divergent penetrating rays to be detected. A focussed grid collimator is interposed between the body and the position sensitive detector for collimating the penetrating rays to be detected. The source of penetrating radiation is preferably a monochromatic source.</p>
申请公布号 AU503520(B2) 申请公布日期 1979.09.06
申请号 AU19750087101 申请日期 1975.11.28
申请人 BOARD OF TRUSTEES OF LELAND STANFORD, JR UNIVERSITY 发明人 D.P. BOYD
分类号 A61B6/03;G01N23/04;G01T1/29;G06Q50/00;G06T1/00;H01J47/06;(IPC1-7):01D7/10;05G1/26;01J39/28;61B6/02;01N23/04;05G1/02 主分类号 A61B6/03
代理机构 代理人
主权项
地址