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摘要目的与常规基于轮廓的图像分割法和主动脉血流测量比较,评价基于心肌信号强度阈值的半自动心脏MRI分割法的准确性和效率。方法分别用常规的和基于阈值的2种分割方法 ,在短轴电影影像上测量148例病人[(55±18)岁,男81例]的左心室容积和心肌质量。采用相位对比影像
Abstract Objective To evaluate the accuracy and efficiency of semi-automatic cardiac MRI segmentation based on myocardial signal intensity threshold compared with conventional contour-based image segmentation and aortic flow measurement. Methods The left ventricular mass and myocardial mass of 148 patients [(55 ± 18) years, 81 males and 81 females] were measured on short-axis cine images using both conventional and threshold-based methods. Using phase contrast image