The aortic valve shows three thin and delicate cusps.
主动脉瓣由三个薄而精细的瓣叶组成.
Note there are three cusps sewn into a synthetic ring.
可见三个瓣叶围绕形成环.
Nodules of calcification are seen on the cusps here.
可见瓣膜尖端有钙化结节.
But its all existed B _ spline methods cannot reconstruct complicated surfaces with cusps and arrises.
样条方法具有良好的局部可控性和易解决参数连续性等优良性质,但已有的B样条方法还不能重建有尖点和棱角的曲面.
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