公开(公告)号：US20140206983A1

公开(公告)日：2014-07-24

申请号：US14225491

申请日：2014-03-26

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Volkmar SCHULZ ,  Torsten SOLF ,  Johan OVERWEG ,  Andreas THON

IPC: A61B5/00 ,  A61B6/03

CPC classification number: A61B5/0035 ,  A61B6/037 ,  A61B6/4417 ,  A61B6/5247 ,  G01R33/481 ,  G01T1/1603

Abstract: In a combined system, a magnetic resonance (MR) scanner includes a magnet configured to generate a static magnetic field at least in a MR examination region from which MR data are acquired. Radiation detectors are configured to detect gamma rays generated by positron-electron annihilation events in a positron emission tomography (PET) examination region. The radiation detectors include electron multiplier elements having a direction of electron acceleration arranged substantially parallel or anti-parallel with the static magnetic field. In some embodiments, the magnet is an open magnet having first and second spaced apart magnet pole pieces disposed on opposite sides of a magnetic resonance examination region, and the radiation detectors include first and second arrays of radiation detectors disposed with the first and second spaced apart magnet pole pieces.

Abstract translation: 在组合系统中，磁共振（MR）扫描器包括配置成至少在从其获取MR数据的MR检查区域中产生静态磁场的磁体。 辐射检测器被配置为检测在正电子发射断层摄影（PET）检查区域中由正电子 - 电子湮灭事件产生的γ射线。 辐射检测器包括电子加速器元件，其具有基本上平行于或与静磁场平行的电子加速度方向。 在一些实施例中，磁体是具有设置在磁共振检查区域的相对侧上的第一和第二间隔开的磁极片的开放磁体，并且辐射检测器包括第一和第二辐射检测器阵列，其布置有第一和第二间隔开的 磁极片。

公开(公告)号：US20160320496A1

公开(公告)日：2016-11-03

申请号：US15209842

申请日：2016-07-14

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Thomas FRACH ,  Andreas THON

IPC: G01T1/202 ,  G01T1/20 ,  A61B6/03 ,  G01T1/29

CPC classification number: G01T1/202 ,  A61B6/037 ,  G01T1/1642 ,  G01T1/1644 ,  G01T1/2018 ,  G01T1/2985

Abstract: When designing detector arrays for diagnostic imaging devices, such as PET or SPECT devices, a virtual detector, or pixel, combines scintillator crystals with photodetectors in ratios that deviate from the conventional 1:1 ratio. For instance, multiple photodetectors can be glued to a single crystal to create a virtual pixel which can be software-based or hardware-based. Light energy and time stamp information for a gamma ray hit on the crystal can be calculated using a virtualizer processor or using a trigger line network and time-to-digital converter logic. Additionally or alternatively, multiple crystals can be associated with each of a plurality of photodetectors. A gamma ray hit on a specific crystal is then determined by a table lookup of adjacent photodetectors that register equal light intensities, and the crystal common to such photodetectors is identified as the location of the hit.

Abstract translation: 当设计用于诸如PET或SPECT装置的诊断成像装置的检测器阵列时，虚拟检测器或像素将闪烁体晶体与光电探测器的比率与传统的1:1比例偏离。 例如，可以将多个光电检测器粘合到单晶以创建可以基于软件或基于硬件的虚拟像素。 可以使用虚拟器处理器或使用触发线网络和时间 - 数字转换器逻辑来计算晶体上的伽马射线的光能和时间戳信息。 附加地或替代地，多个晶体可以与多个光电检测器中的每一个相关联。 然后通过对相等的光强度进行注册的相邻光电检测器的表格查找来确定特定晶体上的伽马射线，并且将这种光电探测器公共的晶体识别为命中的位置。