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1. 发明授权

US06429432B1 Gamma radiation isolation shield and method of use 有权
标题翻译：伽玛辐射隔离屏蔽及使用方法
公开(公告)号：US06429432B1
公开(公告)日：2002-08-06
申请号：US09449787
申请日：1999-11-26
申请人： Colin J. McNaught , Douglas Arthur Kieper , Benjamin Lawrence Welch , Lee Holland Fairchild
发明人： Colin J. McNaught , Douglas Arthur Kieper , Benjamin Lawrence Welch , Lee Holland Fairchild
IPC分类号： G01T1161
CPC分类号： G21F3/00 , G01T1/1648
摘要： An adjustable gamma radiation isolation shield that effectively shields the gamma camera from potentially interfering radiation emitted from sources other than the particular anatomical portion under examination. The shield is placed adjacent to the breast or other body portion under examination on the side thereof opposite that addressed by the gamma camera i.e., at about 90° to the viewing angle of the camera. The shield includes a first gamma ray permeable layer capable of absorbing fluorescent low energy radiation produced by a second adjacent gamma radiation absorbing layer or any other source. In operation, the breast is located between the gamma camera/detector and shield. Gamma radiation emitted by the radiopharmaceutical-containing breast impinges the gamma camera for measurement and simultaneously penetrates the gamma permeable layer and is absorbed by the gamma radiation absorbing layer. Fluorescence produced upon absorption of the gamma radiation is inhibited from reintroduction into the gamma camera by absorption in the first gamma permeable layer that absorbs this secondary radiation. Gamma or other potentially interfering radiation entering the system from beyond the gamma radiation absorbing layer is similarly absorbed and any secondary fluorescent radiation produced therein absorbed by the first gamma permeable layer.
摘要翻译：一个可调节的伽马辐射隔离屏蔽，可有效屏蔽伽马相机免受从被检查的特定解剖部分以外的其他光源发射的潜在干扰辐射。护罩被放置在与伽马照相机相对的一侧相对于被检查的乳房或其他身体部分附近，即与摄像机的视角成约90°。屏蔽包括能够吸收由第二相邻伽马射线吸收层或任何其它源产生的荧光低能辐射的第一伽马射线可渗透层。在操作中，乳房位于伽马相机/检测器和屏蔽之间。由含放射性药物的乳腺发射的γ射线照射用于测量的γ照相机并同时穿透γ透射层并被伽马射线吸收层吸收。通过在吸收该二次辐射的第一γ透射层中的吸收来抑制伽马射线吸收时产生的荧光被再次引入γ照相机。 γ射线吸收层之外进入系统的γ或其他潜在干扰辐射被类似地吸收，并且其中产生的任何二次荧光辐射由第一γ透射层吸收。

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