横、纵向方差比值
ratio-of-horizontal-and-vertical-variances
射血分数－压差比值
ejection fraction-pressure gradient ratio EFPR
逐点差值比较
comparing different point method
逐点差值比较法
difference compare method point-by-point
横向差异速度比值
lateral differential velocity ratio
局部方差均值比率
Local variance to mean ratio
均值差异性比较
comparison of mean difference
三孔隙度差值及比值法
three-porosity difference value method
透射比示值误差
Error measurement results of transmission percentage