专利汇可以提供Gamma camera activated to be responsive to selected levels of light emission专利检索,专利查询,专利分析的服务。并且The invention concerns apparatus for use in investigating the distribution of radiation from an extended source of ionising rays and is particularly concerned with gamma cameras for sensing Gamma radiation. In normal Gamma cameras, due to the long exposure time, the sensitivity of the camera is reduced by spurious light emission from the scintillation screen. In the present invention the effect of this spurious emission is reduced by only triggering the image intensifier in response to predetermined values of light emission. This predetermined triggering is achieved by collecting the unwanted light emitted at the edges of the scintillation screen and directing this into one or more photomultipliers, the outputs of which are taken to a pulse height analyser which is used to trigger the image intensifier.,下面是Gamma camera activated to be responsive to selected levels of light emission专利的具体信息内容。
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