In order to improve the accuracy of the measurement of superposition hole, an approximate solution based on image subtraction technique to identify the superposition holes was put forward.
为了提高纸靶重孔的测量准确性，提出一种基于图像减影技术的重孔识别方法。
Conclusion Digital subtraction MRI is an effective and simple post-processing technique, which is also time-saving and reliable with high image quality.
结论MR数字减影技术是一种简便易行而有效的图像后处理方法，而且省时、可靠和成像质量高。
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