In the wafer notch detecting part, edge flexion method is adopted to find the notch range, then calculating the notch center by means of arc fitting.
缺口检测先采用边缘变化率算法查找缺口范围，再通过圆弧拟合的方法求出缺口中心位置。
The detecting rate of nodule notch sign on MPR in malignant nodule was 70%, which was of significant difference between MPR and plain CT scan.
恶性支气管血管连接在MPR的切迹征检出率为70 % ，与横断扫描之间有显著差异。
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