会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 6. 发明授权
    • Transmission attenuation correction method for PET and SPECT
    • PET和SPECT传输衰减校正方法
    • US06429434B1
    • 2002-08-06
    • US09398497
    • 1999-09-17
    • Charles C. WatsonStephen D. MillerRonald NuttMichael E. CaseyJames J. Hamill
    • Charles C. WatsonStephen D. MillerRonald NuttMichael E. CaseyJames J. Hamill
    • G01T1166
    • G01T1/2985A61B6/037G01T1/1648G21K1/02
    • A transmission source serves to detect activity from a radiation source for correcting attenuation in either PET mode or SPECT mode. The transmission source includes a detector dedicated to collecting attenuation data in PET mode. A collimated radiation source and a detector are positioned with respect to a tomography device such that only a selected strip of the imaging detector of the tomograph is illuminated such that events unrelated to the attenuation are eliminated. The transmission source can either be a coincidence transmission source or a singles transmission source and includes a collimator in which is disposed a radiation source. An opening is defined by the collimator for exposing a selected portion of the imaging detectors of the tomograph device. Positioned behind the radiation source, relative to the imaging detectors, is the dedicated attenuation detector. In a dual head tomograph device, one transmission source of the present invention is disposed opposite each bank of imaging detectors. The sources and the associated collimators are positioned to the side of each head at a slight angle relative to the respective head. The sources and detectors are fixed relative to the imaging heads. In order to obtain full coverage of the field of view (FOV) in the same manner as for an emission scan, the heads and sources are rotated about the center of the camera. In SPECT mode, the point source is selected to have sufficiently high energy to shine through the patient and the collimators associated with the imaging detector.
    • 传输源用于检测来自辐射源的活动以校正PET模式或SPECT模式中的衰减。 传输源包括专用于在PET模式下收集衰减数据的检测器。 准直辐射源和检测器相对于断层摄影装置定位,使得只有层析成像仪的成像检测器的选定条带被照亮,从而消除与衰减无关的事件。 传输源可以是重合传输源或单个传输源,并且包括准直仪,其中设置有辐射源。 由准直器限定开口以暴露层析成像装置的成像检测器的选定部分。 相对于成像检测器定位在辐射源之后,是专用的衰减检测器。 在双头断层摄影装置中,本发明的一个发射源与每一组成像检测器相对设置。 源和相关联的准直仪相对于相应的头部以相当小的角度定位在每个头部的侧面。 源和检测器相对于成像头是固定的。 为了以与发射扫描相同的方式获得视场(FOV)的全面覆盖,头部和源围绕照相机的中心旋转。 在SPECT模式中,点源被选择为具有足够高的能量以照射通过患者和与成像检测器相关联的准直仪。
    • 10. 发明授权
    • Gamma camera system having multi-resolution detectors
    • 伽玛相机系统具有多分辨率检测器
    • US06177675B1
    • 2001-01-23
    • US09064458
    • 1998-04-22
    • Daniel GagnonStephen D. MillerWilliam G. Hawkins
    • Daniel GagnonStephen D. MillerWilliam G. Hawkins
    • G01T1166
    • G01T1/1647
    • A gamma camera system includes a rotatable gantry supporting multiple detector heads each capable of receiving radiation from a region of interest of a subject disposed in an examination region. Each of the detector heads include a collimator which substantially defines the resolution and sensitivity of the respective detector head. At least two of the detector heads include collimators providing different resolution. Preferably, one of the collimators provides a detector head with substantially high resolution and another provides a detector head with substantially high sensitivity. An operator selectively combines image data detected by each of the multiple detector heads. If desired, the operator combine the image data from the multiple detector heads in a variety of manners to obtain images of various resolution and sensitivity from a single imaging procedure. The operator may also selectively weight the contribution that the image data from each of the detector heads has in the overall image. As yet another option, the operator may choose to combine only a high energy portion of the image data so as to minimize the amount of scatter events which are included in a final image.
    • 伽马照相机系统包括可旋转机架,其支撑多个检测器头,每个检测器能够接收来自设置在检查区域中的对象的感兴趣区域的辐射。 每个检测器头包括基本上限定相应检测器头的分辨率和灵敏度的准直器。 至少两个检测器头包括提供不同分辨率的准直仪。 优选地,准直仪之一提供具有基本上高分辨率的检测器头,并且另一个提供具有基本上高灵敏度的检测器头。 操作者选择性地组合由多个检测器头中的每一个检测的图像数据。 如果需要,操作员以各种方式组合来自多个探测器头的图像数据,以从单个成像过程获得各种分辨率和灵敏度的图像。 操作者还可以选择性地加权来自每个检测器头部的图像数据对整个图像的贡献。 作为另一选择,操作者可以选择仅组合图像数据的高能量部分,以便最小化包括在最终图像中的散射事件的量。