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11. 发明申请

US20070221850A1 Attenuation correction for nuclear medical imaging scanners with simultaneous transmission and emission acquisition 失效
标题翻译：具有同时传输和发射采集的核医学成像扫描仪的衰减校正
公开(公告)号：US20070221850A1
公开(公告)日：2007-09-27
申请号：US11387263
申请日：2006-03-23
申请人： Vladimir Panin , Maurizio Conti , Michael Casey
发明人： Vladimir Panin , Maurizio Conti , Michael Casey
IPC分类号： G01T1/166
CPC分类号： G01T1/1617
摘要： For patient transmission data acquired simultaneously with patient emission data, blank transmission data are acquired in the absence of the patient emission and therefore under count rate conditions different from the count rate conditions of the patient transmission data. To prevent the different count rate conditions from causing artifacts in reconstructed tomographic images, a correction is made for spatially varying count rate effects on the attenuation correction. For example, the blank scan data are adjusted according to the count rate at which the patient emission data are acquired, and the adjusted blank scan data and the patient transmission data are used for attenuation correction of the patient emission data used for reconstructing a tomographic image.
摘要翻译：对于与患者发射数据同时获得的患者传输数据，在不存在患者发射的情况下获取空白传输数据，因此在与患者传输数据的计数速率条件不同的计数速率条件下获取。为了防止不同的计数率条件在重建的断层图像中造成伪像，对空间变化的计数率对衰减校正的影响进行了校正。例如，根据获取患者发射数据的计数率来调整空白扫描数据，并且将经调整的空白扫描数据和患者传输数据用于用于重建断层图像的患者排放数据的衰减校正。

12. 发明申请

US20070106154A1 Method for reducing an electronic time coincidence window in positron emission tomography 有权
标题翻译：正电子发射断层扫描中减少电子时间符合窗口的方法
公开(公告)号：US20070106154A1
公开(公告)日：2007-05-10
申请号：US11265758
申请日：2005-11-02
申请人： Maurizio Conti
发明人： Maurizio Conti
IPC分类号： A61B6/00
CPC分类号： G01T1/2985 , A61B6/037 , A61B8/00 , G01T1/1611
摘要： A method for acquiring PET images with reduced time coincidence window limits includes obtaining a preliminary image of a patient within a radiation field of view (FOV), determining the spatial location of the patient within the FOV based on the preliminary image, calculating a different time coincidence window based on the spatial location of the patient for each possible pair of oppositely disposed detectors, scanning the patient with a PET scanning system to detect a pair of gamma photons produced by an annihilation event, determining whether the detection of the pair of gamma photons occurs within the time coincidence window, accepting the detected event only if the detection of the gamma photons occurs within the time coincidence window, calculating the spatial location of accepted annihilation event, and adding the calculated spatial location of the annihilation event to a stored distribution of calculated annihilation event spatial locations representing the distribution of radioactivity in the patient.
摘要翻译：用于以缩短的时间一致窗口极限获取PET图像的方法包括获得在辐射视场（FOV）内的患者的初步图像，基于初步图像确定患者在FOV内的空间位置，计算不同时间基于每个可能的一对相对布置的检测器的患者的空间位置的重合窗口，用PET扫描系统扫描患者以检测由湮灭事件产生的一对伽马光子，确定是否检测到该对γ光子在时间一致窗口内发生，只有当伽马光子的检测发生在时间一致窗口内时，接受检测到的事件，计算接受的湮灭事件的空间位置，并将计算出的湮灭事件的空间位置加到计算的湮灭事件空间位置表示辐射的分布患者的活动性

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