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1. 发明授权

US4913159A Method for determining blood flow through a narrowed orifice using color doppler echocardiography 失效
标题翻译：使用彩色多普勒超声心动图测定通过狭窄孔的血流量的方法
公开(公告)号：US4913159A
公开(公告)日：1990-04-03
申请号：US325562
申请日：1989-03-17
申请人： Julius M. Gardin , Toshio Ogawa , Toshinori Utsunomiya , Hoang A. Tang
发明人： Julius M. Gardin , Toshio Ogawa , Toshinori Utsunomiya , Hoang A. Tang
IPC分类号： G01P5/00 , A61B8/00 , A61B8/06 , G01F1/66 , G01S7/52 , G01S15/89
CPC分类号： A61B8/06 , G01S15/8979 , G01S7/52071
摘要： A multi-gated pulsed wave color Doppler imaging system is used to provide accurate non-invasive measurements of liquid flow through a narrowed orifice by using the color Doppler to first measure the velocity of flow along an axis perpendicular to the orifice to provide a first image of the liquid velocity. The first image includes a two-color interface at locations in the image representing locations where the liquid velocity is equal to the aliasing velocity of the color Doppler imaging system. The distance from the two-color interface to the center of the orifice is measured and saved. A second image is obtained along an axis perpendicular to the first axis to represent the flow of liquid to the orifice from the perimeter of the orifice. The distance from a two-color interface to the center of the orifice in the second image is measured. The two measured dimensions are used to model a hemi-ellipsoidal surface proximal to the orifice wherein all points on the surface have the same isovelocity. The surface area is multiplied by the aliasing velocity to obtain the volume fluid flow rate through the orifice. A third image can also be obtained along a third axis perpendicular to the first and second axes and used to model an alternative hemi-ellipsoidal isovelocity surface. In a further alternative, a single image can be used to model a panshaped isovelocity surface.
摘要翻译：多门脉冲波彩色多普勒成像系统用于通过使用彩色多普勒来首先测量沿着与孔口垂直的轴线的流速来提供通过狭窄孔口的液体流动的精确非侵入性测量，以提供第一图像的液体速度。第一图像包括在图像中的位置处的双色界面，表示液体速度等于彩色多普勒成像系统的混叠速度的位置。测量并保存从双色界面到孔口中心的距离。沿着垂直于第一轴的轴获得第二图像，以表示从孔的周边到液体的液体流。测量在第二图像中从双色界面到孔口中心的距离。两个测量的尺寸用于模拟靠近孔口的半椭球表面，其中表面上的所有点具有相同的移动速度。表面积乘以混叠速度，以获得通过孔口的体积流体流速。也可以沿着垂直于第一和第二轴线的第三轴获得第三图像，并且用于对替代的半椭圆形速度表面进行建模。在另一个替代方案中，可以使用单个图像来模拟圆锥形的速度表面。

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