摘要
目的:探讨脑区功能性MRI成像参数的选择对图像质量的影响。方法:2012年2-12月期间对9名青年志愿者进行脑区功能性MRI扫描,分析其成像参数对影像质量的影响。结果:通过logistic回归分析,b值越低1级图像越多、3级图像越少;弥散敏感梯度方向数越多1级图像越多、3级图像越少;层厚和(或)层间距越大1级图像越多、3级图像越少。对图像质量影响最大的是层厚和(或)层间距、弥散敏感梯度方向数和b值。结论:脑区功能性MRI图像质量的影响因素包括层厚和(或)层间距、弥散敏感梯度方向数和b值,在参数选择过程中需从诊断目的出发,权衡利弊,综合考虑。
Objective: To discuss the effect of the choice of brain functional MRI parameter on image quality. Methods: To select nine young volunteers for scanning brain functional MRI from February to December, 2012, and analyze the effect caused by parameters to the image quality. Results: The lower of the b value, the more level 1 image, the less level 3 image; the more of the number of diffusion sensitive gradient direction, the more level 1 image, the less level 5 image. The 1 .argest impact on image quality is the interlayer spacing, the number of diffusion sensitive gradient direction and the b value. Conclusion: The factors influencing the quality of brain functional MRI images including the interlayer spacing, the number of diffusion sensitive gradient direction and b value. In the parameter selection process, one should start from diagnostic purposes and weigh the pros and cons with overall consideration.
出处
《中国医学装备》
2014年第3期29-31,共3页
China Medical Equipment