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公开(公告)号：US08353836B2
公开(公告)日：2013-01-15
申请号：US11597325
申请日：2004-11-10
CPC分类号： A61B8/06
摘要： The present invention provides an ultrasonic diagnostic apparatus realizing improved visibility of a contour shape of signal components in an ultrasonic blood flow spectrum display image. The apparatus includes a gray-level correction unit for correcting intensity of an output result of a Doppler processing unit. The Doppler processing unit calculates a Doppler frequency shift in a reception signal output from a receiver and calculates blood flow velocity of a subject on the basis of the Doppler frequency shift. The gray-level correction unit has: a filtering unit for separating a signal and a noise from each other, which are included in a time-varying waveform of the blood flow velocity of the subject obtained by the Doppler processing unit on the basis of continuity on a space defined by the blood flow velocity and time; and a gray-level corrector for performing a gray level correction using, as a parameter, a boundary value between signal intensity and noise intensity obtained by the filtering unit.
摘要翻译： 本发明提供一种实现超声波血流频谱显示图像中的信号成分的轮廓形状的可视化的超声波诊断装置。 该装置包括用于校正多普勒处理单元的输出结果的强度的灰度级校正单元。 多普勒处理单元计算从接收器输出的接收信号中的多普勒频移，并根据多普勒频移计算被检者的血流速度。 灰度级校正单元具有：滤波单元，用于将信号和噪声彼此分离，所述滤波单元包括在由多普勒处理单元基于连续性获得的对象的血流速度的时变波形中 在由血流速度和时间限定的空间上; 以及灰度级校正器，用于使用由滤波单元获得的信号强度和噪声强度之间的边界值作为参数来执行灰度校正。
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公开(公告)号：US20090163816A1
公开(公告)日：2009-06-25
申请号：US11597325
申请日：2004-11-10
IPC分类号： A61B8/06
CPC分类号： A61B8/06
摘要： The present invention provides an ultrasonic diagnostic apparatus realizing improved visibility of a contour shape of signal components in an ultrasonic blood flow spectrum display image. The apparatus includes a gray-level correction unit for correcting intensity of an output result of a Doppler processing unit. The Doppler processing unit calculates a Doppler frequency shift in a reception signal output from a receiver and calculates blood flow velocity of a subject on the basis of the Doppler frequency shift. The gray-level correction unit has: a filtering unit for separating a signal and a noise from each other, which are included in a time-varying waveform of the blood flow velocity of the subject obtained by the Doppler processing unit on the basis of continuity on a space defined by the blood flow velocity and time; and a gray-level corrector for performing a gray level correction using, as a parameter, a boundary value between signal intensity and noise intensity obtained by the filtering unit.
摘要翻译： 本发明提供一种实现超声波血流频谱显示图像中的信号成分的轮廓形状的可视化的超声波诊断装置。 该装置包括用于校正多普勒处理单元的输出结果的强度的灰度级校正单元。 多普勒处理单元计算从接收器输出的接收信号中的多普勒频移，并根据多普勒频移计算被检者的血流速度。 灰度级校正单元具有：滤波单元，用于将信号和噪声彼此分离，所述滤波单元包括在由多普勒处理单元基于连续性获得的对象的血流速度的时变波形中 在由血流速度和时间限定的空间上; 以及灰度级校正器，用于使用由滤波单元获得的信号强度和噪声强度之间的边界值作为参数来执行灰度校正。
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