Ultrasound diagnostic apparatus and ultrasound signal analyzing method

摘要

In quantitative analysis using blood flow velocity measurement and the like, whether to select the forward direction or reverse direction is determined in accordance with the positional relationship between a baseline for controlling the display scale of a Doppler waveform and a reference line which can be arbitrarily set by an operator. The determination is executed at one of the stages of selecting a tracing direction by an automatic tracing process, selecting an approximate Doppler waveform as an analysis target, and selecting an analysis result as a display target.

主权项

1. An ultrasound diagnostic apparatus comprising:
a computer comprising:
a Doppler information generating processor which generates blood flow Doppler waveforms concerning at least one of a first direction and second direction on the basis of echo signals obtained by ultrasound waves transmitted to a subject to be examined on the basis of supplied driving signals;a determining processor which determines, based on a position of a baseline of the Doppler waveforms within a display area of the Doppler waveforms, said baseline indicating a zero Doppler velocity and set at a position where a Doppler shift is zero, an end portion of the Doppler waveforms in a positive frequency direction or an end portion of the Doppler waveforms in a negative frequency direction as a target region;wherein the determining processor sets the target region, depending on whether the baseline is located in a first range set in a display area of the Doppler waveforms, the first range set including the reference line as one of two boundary lines; andan approximate information generating processor which generates approximate information by tracing the blood flow Doppler waveforms corresponding to the target region;wherein the approximate information generating processor generates approximate waveforms as the approximate information; and a display which displays the approximate information in the target region above or below the baseline based on the set target region, and wherein the determining processor performs the determination in accordance with a positional relationship between the baseline and a reference line set in advance at a desired position in the display area of the Doppler waveforms, and wherein the reference line indicates the desired position and vertically divides the display area of the Doppler waveforms.