公开(公告)号：US20050156112A1

公开(公告)日：2005-07-21

申请号：US11028270

申请日：2005-01-03

Applicant: John Williams ,  Dershan Luo ,  Mark Limkeman ,  Michael Cook ,  David McDaniel ,  Edwin Oswalt ,  Mark Feilen

Inventor： John Williams ,  Dershan Luo ,  Mark Limkeman ,  Michael Cook ,  David McDaniel ,  Edwin Oswalt ,  Mark Feilen

IPC: G01T1/161 ,  G01T1/164 ,  G01T1/172 ,  G01T1/29

CPC classification number: G01T1/2985

Abstract: A method of calibrating detectors in a detector ring of a PET scanner, each detector including a plurality of crystals, the PET scanner having a field of view, is disclosed. The method comprises collecting timing data indicative of coincidence events occurring between each pair of crystals within the field of view. The method further comprises determining a detector adjustment value for each detector, determining a crystal adjustment value for each crystal in each detector, and discretizing the crystal adjustment value for each crystal to produce a discretized crystal adjustment value for each crystal. Lastly, the method comprises calibrating each detector by applying the discretized crystal adjustment value for each crystal in each detector to the collected timing data indicative of coincidence events.

Abstract translation: 公开了一种校准PET扫描器的检测器环中的检测器的方法，每个检测器包括多个晶体，PET扫描器具有视野。 该方法包括收集指示在视场内的每对晶体之间发生的重合事件的定时数据。 该方法还包括确定每个检测器的检测器调整值，确定每个检测器中的每个晶体的晶体调整值，以及离散每个晶体的晶体调整值以产生每个晶体的离散晶体调节值。 最后，该方法包括通过将每个检测器中的每个晶体的离散晶体调整值应用于指示符合事件的收集的定时数据来校准每个检测器。