公开(公告)号：US09320440B2

公开(公告)日：2016-04-26

申请号：US14242322

申请日：2014-04-01

申请人： Xerox Corporation

发明人： Survi Kyal ,  Lalit Keshav Mestha ,  Jean-Philippe Couderc

IPC分类号： A61B5/02 ,  A61B5/00 ,  A61B5/0295 ,  A61B5/107

CPC分类号： A61B5/0077 ,  A61B5/0082 ,  A61B5/0295 ,  A61B5/1073

摘要： What is disclosed is a system and method for determining whether a subject is in atrial fibrillation. A video is received of a region of exposed skin of a subject. The video is acquired of a region where a videoplethysmographic (VPG) signal can be registered by at least one imaging channel of a video imaging device. For each batch of image frames, pixels associated with the region of exposed skin are isolated and processed to obtain a time-series signal. A VPG signal is extracted from the time-series signal. The power spectral density (PSD) is computed across all frequencies within the VPG signal. A pulse harmonic strength (PHS) is calculated for this VPG signal. The pulse harmonic strength is compared to a discrimination threshold, defined herein. A determination is made whether the subject in the video is in atrial fibrillation or in normal sinus rhythm.

摘要翻译： 公开的是用于确定受试者是否在心房颤动中的系统和方法。 收到受试者暴露皮肤区域的视频。 获取视频体积描记（VPG）信号的区域可以由视频成像设备的至少一个成像通道注册的视频。 对于每批图像帧，与暴露皮肤区域相关联的像素被隔离并处理以获得时间序列信号。 从时间序列信号中提取VPG信号。 在VPG信号内的所有频率上计算功率谱密度（PSD）。 为该VPG信号计算脉冲谐波强度（PHS）。 将脉冲谐波强度与本文定义的鉴别阈值进行比较。 视频中的主体是否处于心房颤动或正常窦性心律中。