Methods: The image was used to measure SNR.The parameters such as FOV,thick,NEX and pulse sequences such as SE,FSE,STIR,FLAIR and FLASH were altered.

• 方法利用所得测试体模的图像计算信噪比,改变视野、层厚和激励次数等扫描参数,应用于SE、FSE等五个常见扫描序列,分析图像质量。