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    • 86. 发明授权
    • Phase detector
    • 相位检测器
    • US08026742B1
    • 2011-09-27
    • US12860440
    • 2010-08-20
    • Pantas SutardjaChristopher L. PainterYingxuan LiQing Yang
    • Pantas SutardjaChristopher L. PainterYingxuan LiQing Yang
    • H03D13/00
    • H03D13/00
    • In one embodiment, a phase detector is provided comprising a first input, a second input, and first circuitry in communication with the first and second inputs, the first circuitry operative to provide an indication of a phase difference between a first signal supplied by the first input and a second signal supplied by the second input, wherein an aberration in one of the first and second signals results in an incorrect indication of phase difference. The phase detector also comprises second circuitry in communication with the first circuitry, the second circuitry operative to provide a correct indication of phase difference despite the aberration in the at least one of the first and second signals. In another embodiment, a differential phase detector is provided.
    • 在一个实施例中,提供了一种相位检测器,包括第一输入端,第二输入端和与第一和第二输入端通信的第一电路,第一电路用于提供由第一输入端提供的第一信号之间的相位差的指示, 输入和由第二输入提供的第二信号,其中第一和第二信号之一中的像差导致相位差的不正确指示。 相位检测器还包括与第一电路通信的第二电路,第二电路可操作以提供相位差的正确指示,尽管第一和第二信号中的至少一个信号中存在像差。 在另一个实施例中,提供差分相位检测器。
    • 87. 发明申请
    • METHOD AND SYSTEM FOR MAPPING TISSUE STATUS OF ACUTE STROKE
    • 用于绘制急性呼吸的组织状态的方法和系统
    • US20110229003A1
    • 2011-09-22
    • US13128645
    • 2009-11-13
    • Qing Yang
    • Qing Yang
    • G06K9/00
    • A61B5/055A61B5/416A61B6/501A61B6/507A61B6/5217A61B6/5247G06T7/0012G06T7/11G06T7/136G06T2207/10072G06T2207/30104
    • The current invention provides a method of identifying a ischemic lesion. The method includes loading perfusion imaging data into an electronic memory element and deriving perfusion maps from the perfusion imaging data, where the perfusion maps include a cerebral blood volume (CBV) map and an arterial delay time (DT) map, which utilize arterial delay and dispersion effects. Ischemic pixels are determined from the perfusion imaging data, where the DT is greater than a predetermined first threshold value and the CBV is below a second threshold value and the infarct portion of the ischemic lesion is determined, where DT is greater than a predetermined third threshold value and/or the CBV is below a forth threshold value. A cluster analysis is applied to all of the determined ischemic lesion and infarct pixels and the penumbra is then determined, where mismatch regions between the ischemic lesion and the infarct core define the penumbra.
    • 本发明提供了鉴定缺血性病变的方法。 所述方法包括将灌注成像数据加载到电子存储元件中并从灌注成像数据中导出灌注图,其中灌注图包括使用动脉延迟的脑血容量(CBV)图和动脉延迟时间(DT)图, 分散效应。 从灌注成像数据确定缺血像素,其中DT大于预定的第一阈值,并且CBV低于第二阈值,并且确定缺血性损伤的梗塞部分,其中DT大于预定的第三阈值 值和/或CBV低于第四阈值。 对所有确定的缺血性病变和梗死像素进行聚类分析,然后确定半暗带,其中缺血性病变与梗死核之间的不匹配区域定义半暗带。