但利用传统的测量方法，许多三维测量工作仅能依靠一些简单的手工操作进行估算，如在医学领域需要完成的二尖瓣面积、正常眼眶实际形状、大小以及肿瘤体积等复杂三维测量工作都是如此。
But many 3-d measurements only can be estimated by handiwork now, for example, the area of mitral valve, the shape and size of eyepit and the volume of tumour in medicine field.
结果二尖瓣环面积在心动周期中不断发生变化。
Results the mitral annular area were changed throughout the cardiac cycle.
结果表明，M型彩色多普勒血流会聚法与二维彩色多普勒血流会聚法在检测二尖瓣狭窄瓣口面积方面基本可靠，但两者的准确性无显著差异。
It was concluded that M-mode and two-dimensional color Doppler flow convergence region could be used to quantificate the area of mitral stenosis accurately.
最大二尖瓣环面积指数发生于舒张晚期，最小二尖瓣环面积指数发生于收缩中期。
The mitral annular area index was increased in diastole, to a maximum in late diastole and decreased to a minimum in mid-systole.
二尖瓣关闭不全程度用频谱多普勒测定的有效返流口面积确定。
Mitral insufficient grades were determined by the effective regurgitant orifice area measured with spectral Doppler.
目的探讨二尖瓣狭窄伴反流的患者用压差减半时间(pht)法测量二尖瓣口面积的应用价值。
Objective To explore the clinical application of pressure half-time (PHT) method on rheumatic mitral stenosis coexisting mitral regurgitation.
目的研究左房内径、二尖瓣口面积、二尖瓣返流对左房血栓形成的影响。
Pupose To study the influence of left atrial diameter, area of mitral orifice and mitral regurgitation on thrombosis in left atrium.
观察36例经皮球囊导管二尖瓣分离术治疗的二尖瓣狭窄患者，发现其术后瓣口面积的大小。
The mitral valve area (MVA) after percutaneous balloon catheter mitralcommissurotomy (PBMC) was assessed in 36 patients with mitral stenosis.
结论DSCT可准确评价二尖瓣病变瓣口面积。
Conclusion DSCT can accurate measure mitral valve orifice area with heart mitral disease.
结论DSCT可准确评价二尖瓣病变瓣口面积。
Conclusion DSCT can accurate measure mitral valve orifice area with heart mitral disease.
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