中国医疗设备2017，Vol.32Issue(7)：56-59,4.DOI:10.3969/j.issn.1674-1633.2017.07.016
不同参数条件下巴马小型猪腰椎神经根扩散张量成像的比较研究
Comparative Study of Diffusion Tensor Imaging with Different Parameters of Bama Minipig Lumbar Nerve Roots
摘要
Abstract
Objective To summarize the optimal sequence parameters, we compared the image quality of diffusion tensor imaging (DTI) with different sequence parameters in lumbar nerve roots of Bama minipig at 1.5 T. Methods We performed lumbar DTI scan on 10 pigs for 3 times based on different combinations of slice thickness, view field and matrix. The signal to noise ratio and reconstructed diffusion tensor tractography (DTT) were measured by 3 experienced radiologists, then the DTT images were evaluated and scored. Scoring results were analyzed statistically with the statistical analysis. Results There was no significant differences in the SNR among different DTI images (P>0.05) when the voxel size were similar, whereas the slice thickness and FOV were different. The difference of DTI image score was statistically significant among the different sequences of FOV (P<0.05). The relative smaller FOV sequence had relative higher DDT image score. Conclusion Voxel size depends on slice thickness, view field and matrix, either too large or too small voxel can cause poor image quality. The DTT images show more nerve fibers and better continuity when use the small view field (72 mm×72 mm) in combination with small matrix. Therefore, this combination is a good choice for DTI evaluation of lumbar nerve root in miniature pigs.关键词
扩散张量成像/巴马小型猪/腰椎/神经根/参数Key words
diffusion tensor imaging/miniature pig/lumbar/nerve roots/parameters分类
医药卫生引用本文复制引用
肖建明,彭涛,牛翔科,王宗勇,植彪..不同参数条件下巴马小型猪腰椎神经根扩散张量成像的比较研究[J].中国医疗设备,2017,32(7):56-59,4.基金项目
四川省医学科研青年创新课题计划(Q14004). （Q14004）
