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公开(公告)号：US06915004B2
公开(公告)日：2005-07-05
申请号：US10086906
申请日：2002-02-28
CPC分类号： G06T11/005 , G06T11/006 , G06T2211/428 , Y10S128/922
摘要： Apparatus and methods for three dimensional image reconstruction from data acquired in a positron emission tomograph (PET). This invention uses a parallel/pipelined architecture for processing the acquired data as it is acquired from the scanner. The asynchronously acquired data is synchronously stepped through the stages performing histogramming, normalization, transmission/attenuation, Mu image reconstruction, attenuation correction, rebinning, image reconstruction, scatter correction, and image display.
摘要翻译： 在正电子发射断层扫描（PET）中获取的数据进行三维图像重建的装置和方法。 本发明使用并行/流水线架构来处理从扫描器获取的所获取的数据。 通过执行直方图，归一化，发送/衰减，Mu图像重建，衰减校正，重组，图像重建，散射校正和图像显示的阶段，异步采集的数据被同步地步进。
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2.发明申请Method for Energy Calculation and Pileup Determination for Continuously Sampled Nuclear Pulse Processing 有权用于连续采样核脉冲处理的能量计算和堆积测定方法公开(公告)号：US20090074281A1
公开(公告)日：2009-03-19
申请号：US12210464
申请日：2008-09-15
IPC分类号： G06K9/00
CPC分类号： A61B6/032 , A61B6/037 , A61B6/5235 , A61B2503/40 , G01T1/1644
摘要： A method for processing events in a medical imaging device may comprise the steps of receiving analog signals from at least one PMT into an Applied Specific Integrated Circuit (ASIC) comprising a Constant Fraction Discriminator (CFD) and transmitting analog outputs from the ASIC. Further, sampling the analog outputs continuously using an Analog to Digital Converter (ADC) and transmitting digital outputs; and collecting a number of samples of the digital output during a sampling period using a Field Programmable Gate Array (FPGA) when triggered by the CFD. The method may additionally determine the energy of the analog signals from the at lease one PMT by subtracting the peak value of each signal from the baseline value of each signal, wherein the peak value is determined as an average of at least one sample taken only around the peak during the sampling period, and the baseline value is determined as an average of at least one sample taken only around the beginning or end of the sampling period.
摘要翻译： 用于在医疗成像设备中处理事件的方法可以包括以下步骤：从至少一个PMT接收模拟信号到包括恒定分数鉴别器（CFD）并且从ASIC传输模拟输出的应用专用集成电路（ASIC）。 此外，使用模数转换器（ADC）连续采样模拟输出并传输数字输出; 以及当由CFD触发时，使用现场可编程门阵列（FPGA）在采样周期期间收集数字输出的多个样本。 该方法可以通过从每个信号的基线值减去每个信号的峰值来另外确定来自至少一个PMT的模拟信号的能量，其中该峰值被确定为仅在周围采集的至少一个采样的平均值 在采样期间的峰值，并且基线值被确定为仅在采样周期的开始或结束周围取得的至少一个采样的平均值。
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3.发明授权公开(公告)号：US08340377B2
公开(公告)日：2012-12-25
申请号：US12210464
申请日：2008-09-15
IPC分类号： G06K9/00
CPC分类号： A61B6/032 , A61B6/037 , A61B6/5235 , A61B2503/40 , G01T1/1644
摘要： A method for processing events in a medical imaging device may comprise the steps of receiving analog signals from at least one PMT into an Applied Specific Integrated Circuit (ASIC) comprising a Constant Fraction Discriminator (CFD) and transmitting analog outputs from the ASIC. Further, sampling the analog outputs continuously using an Analog to Digital Converter (ADC) and transmitting digital outputs; and collecting a number of samples of the digital output during a sampling period using a Field Programmable Gate Array (FPGA) when triggered by the CFD. The method may additionally determine the energy of the analog signals from the at lease one PMT by subtracting the peak value of each signal from the baseline value of each signal, wherein the peak value is determined as an average of at least one sample taken only around the peak during the sampling period, and the baseline value is determined as an average of at least one sample taken only around the beginning or end of the sampling period.
摘要翻译： 用于在医疗成像设备中处理事件的方法可以包括以下步骤：从至少一个PMT接收模拟信号到包括恒定分数鉴别器（CFD）并且从ASIC传输模拟输出的应用专用集成电路（ASIC）。 此外，使用模数转换器（ADC）连续采样模拟输出并传输数字输出; 以及当由CFD触发时，使用现场可编程门阵列（FPGA）在采样周期期间收集数字输出的多个样本。 该方法可以通过从每个信号的基线值减去每个信号的峰值来另外确定来自至少一个PMT的模拟信号的能量，其中该峰值被确定为仅在周围采集的至少一个采样的平均值 在采样期间的峰值，并且基线值被确定为仅在采样周期的开始或结束周围取得的至少一个采样的平均值。
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公开(公告)号：US20110010486A1
公开(公告)日：2011-01-13
申请号：US12499524
申请日：2009-07-08
IPC分类号： G06F12/00
CPC分类号： G01T1/1647
摘要： A PET event position calculation method using a combination angular and radial event map wherein identification of the radial distance of the event from the centroid of the scintillation crystal with which the event is associated as well as angular information is performed. The radial distance can be converted to a statistical confidence interval, which information can be used in downstream processing. More sophisticated reconstruction algorithms can use the confidence interval information selectively, to generate higher fidelity images with higher confidence information, and to improve statistics in dynamic imaging with lower confidence information.
摘要翻译： 使用组合角度和径向事件图的PET事件位置计算方法，其中执行事件与事件相关联的闪烁晶体的质心的事件的径向距离以及角度信息。 可将径向距离转换为统计置信区间，该信息可用于下游处理。 更复杂的重建算法可以选择性地使用置信区间信息，以产生具有较高置信度信息的更高保真度图像，并且利用较低信度信息改进动态成像中的统计。
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