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.
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.
XIAO Jian-ming, PENG Tao,
NIU Xiang-ke, WANG Zong-yong,
ZHI Biao. Comparative Study of Diffusion Tensor Imaging with Different Parameters
of Bama Minipig Lumbar Nerve Roots. China Medical Devices, 2017, 32(7): 56-59.