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1.发明授权Apparatus for measuring density or the like of an object having a small transmission factor 失效用于测量具有小透射系数的物体的密度等的装置
公开(公告)号：US4949365A
公开(公告)日：1990-08-14
申请号：US312343
申请日：1989-02-16
CPC分类号： G01N9/24 , A61B6/4258 , G01N23/08 , G01T1/1642
摘要： An apparatus for measuring the density or the like of an object from the level of transmission through the object of gamma rays having different energy levels which are transmitted at the object by a gamma source having a predetermined solid angle of transmission. A collimator collimates gamma transmitted through the object and a scintillator generates light corresponding to the output of the collimator. Plural photomultipliers generate position-dependent electrical signals corresponding to the light generated by an incident gamma ray photon to the scintillator. A calculating circuit generates a density spectrum for the object from the position-dependent electrical signals by integrating the position-dependent electrical signals corresponding to each of the incident gamma ray photons to the scintillator.
摘要翻译： 一种用于通过具有不同能级的伽马射线的透射水平测量物体的密度等的装置，其通过具有预定立体透射角的伽马源在物体处传送。 准直器准直透射通过物体的伽马射线，并且闪烁体产生对应于准直器的输出的光。 多个光电倍增管产生与由入射的伽马射线光子产生的光对应于闪烁体的位置相关的电信号。 计算电路通过将对应于每个入射的伽马射线光子的与位置相关的电信号与闪烁体进行积分，从位置相关电信号产生对象的密度谱。
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公开(公告)号：US4845747A
公开(公告)日：1989-07-04
申请号：US928405
申请日：1986-11-10
申请人： Kiyoshi Koike , Takuo Fujita , Rikushi Morita
发明人： Kiyoshi Koike , Takuo Fujita , Rikushi Morita
摘要： Apparatus for measuring the density of vertebrae or the like, comprises gamma ray emission means for emitting gamma rays within a predetermined target area; detecting means for detecting the gamma rays passing through the target area; and rotatable positioning means between the emission means and the detecting means for supporting a subject and exposing the subject to the gamma rays in the target area at a plurality of different angles.
摘要翻译： 用于测量椎骨密度等的装置包括用于在预定目标区域内发射伽马射线的伽马射线发射装置; 用于检测通过目标区域的伽马射线的检测装置; 以及在发射装置和检测装置之间的可旋转定位装置，用于支撑被摄体，并以多个不同的角度将被摄体暴露于目标区域中的伽马射线。
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