磁共振成像之SE序列在猪肉质量评估中的应用——TR值对成像质量的影响

Study on the Application of MRI in Evaluation the Quality of Pork ——the TR Value's Influence on Its Quality of Imaging

本文论述了采用核磁共振成像技术(Magneticresonanceimaging,MRI)中的自旋回波(Spinecho,SE)序列对猪肉进行二维成像,从信号成像的质量效果入手,在改变重复时间(Repeattime,TR)值的情况下分析图像变化规律。利用一系列图像信号值拟合得出了所测猪肉的纵向弛豫时间T1范围,并发现了在SE序列成像过程中图像信号与T1之间有相关性。由此可推知,准确计算T1值时应采集相应TR值段的图像信号。而图像中脂肪与瘦肉两部分的对比度在此范围之内也是差别最大,这将有利于今后对猪肉进行NMR成像的质量分析的开展,提供了一种研究食品物质性质的方法。

This article is studying the rule of the image signal value when TR value is changed by MRI of SE sequence. The result is fit to the signal formula of SE sequence. A series of the image outcome show the T1 value on muscle and fat by the use of a fitting software.. The rule between TR value and image signal value can be found. As a result, the best TR value scope will calculate an accurate T1 value. These results will be benefit for the quality analysis of meat in future work, and produce a method for food quality analysis.