High angular resolution diffusion imaging probabilistic tractography of the auditory radiation.
High angular resolution diffusion imaging probabilistic tractography of the auditory radiation.
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DOI：
10.3174/ajnr.a3471
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发表时间：
2013-08
期刊：
影响因子：
--
通讯作者：
Roberts TP
中科院分区：
文献类型：
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作者：
Berman JI;Lanza MR;Blaskey L;Edgar JC;Roberts TP
听觉辐射穿过其他白质轨迹，不能通过DTI纤维跟踪可靠地描绘或定量评估。本研究旨在探讨Hardi纤维追踪技术能否有力地勾勒出纤维束的完整范围。对25名8~26岁的对照组进行哈迪(方向，b=3000 S/mm~2)和弥散张量成像(30方向，b=1000 S/mm~2)检查。听觉辐射的概率Hardi和DTI纤维跟踪是使用从自由漂浮的白质分离自动生成的起始区域和过滤区域来执行的。使用和30个方向的数据集进行弥散张量成像纤维追踪。证明Heschl回与内侧膝状核连接的纤维追踪试验被认为是成功的。Hardi纤维追踪成功率为98%，明显高于方向的50%和30方向的42%(p<；0.001)。左侧和右侧听觉辐射的Hardi纤维追踪成功率无显著差异。相比之下，DTI纤维追踪显示左耳放射的准确率高于右耳。Hardi能分辨出听觉辐射与下纵束交界处的复杂白质通路。Hardi纤维跟踪可以可靠地勾画出听觉辐射。
The auditory radiation crosses other white matter tracks and cannot reliably be delineated or quantitatively assessed with DTI fiber tracking. This study investigates whether HARDI fiber tracking can be used to robustly delineate the full extent of the tract. HARDI (64-direction, b=3000 s/mm2) and DTI (30-direction, b=1000 s/mm2) were acquired from 25 control subjects between the ages of 8 and 26 years. Probabilistic HARDI and DTI fiber tracking of the auditory radiation was performed with starting and filter regions automatically generated from the freesurfer white matter parcellation. DTI fiber tracking was performed with both the 64 and 30-direction data sets. Fiber tracking trials demonstrating connectivity from Heschl's gyrus to the medial geniculate nucleus were considered successful. HARDI fiber tracking success rate was 98% and significantly higher than the 64-direction DTI rate of 50% or the 30-direction DTI rate of 42% (p<0.001). The success rates of HARDI fiber tracking for the left and right auditory radiations were not significantly different. In contrast, the left auditory radiation was successfully delineated with DTI fiber tracking at a higher rate than the right auditory radiation. HARDI can discriminate the complex white matter pathways at the junction of the auditory radiation and the inferior longitudinal fasciculus. HARDI fiber tracking can reliably delineate the auditory radiation.