Analysis and measurement of temporal tissue velocity information
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United States of America Patent
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Oct 13, 1998
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app pub date -
Sep 25, 1996
filing date -
Jul 30, 1996
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Abstract
A method for extracting anatomical M-Mode displays of tissue velocity information along arbitrary curved polygons that can track curved organs such as myocard is described. The generated images can display the temporal velocity variations in a curved organ such as myocard in a single view. Time delays between events can be measured from these images. Furthermore, the invention describes how the time delay of characteristic events in temporal velocity evolutions and information derived from these velocity evolutions can be integrated into spatial time delay images that show the spatial propagation of the selected phenomenon. The characteristic events include switch in velocity direction, peak velocity, peak acceleration and similar aspects of tissue thickening. These characteristic events will be almost angle independent even if the tissue velocity is estimated with a Doppler technique along the propagation direction of the ultrasound beam. The invention further describes how the information extracted in a curved anatomical M-Mode can be utilized to estimate the phase of the regional wall motion in cardiac studies. It is also described how the phase of the regional wall motion can be estimated for all points in the imaged spatial region and displayed as a spatial map of the regional wall motion phase.
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