Diffusion-tensor fiber tractography: Intraindividual comparison of 3.0-T and 1.5-T MR imaging
Diffusion-tensor fiber tractography: Intraindividual comparison of 3.0-T and 1.5-T MR imaging
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DOI：
10.1148/radiol.2382042192
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发表时间：
2006-02-01
期刊：
影响因子：
19.7
通讯作者：
Togashi, K
中科院分区：
文献类型：
--
作者：
Okada, T;Miki, Y;Togashi, K
目的：为了前瞻性地评估在3.0-与1.5-T弥散张量（DT）纤维束成像进行平行imaging.Materials和Methods：获得机构审查委员会的批准，每个主题提供书面知情同意书的描述。受试者为30名健康志愿者（15名男性，15名女性;平均年龄28岁;年龄范围21-46岁）。采用单次激发自旋回波回波平面磁共振（MR）序列并行成像。重建了4条纤维束：皮质脊髓束（CST）、上级纵束（SLF）、胼胝体（CC）和穹窿。两名神经放射学家比较了3.0和1.5 T纤维束成像在纤维束描绘方面（使用5个描绘评分（评分0-4）和重建束纤维数量）以及在CST中的侧向不对称性方面（使用重建纤维数量）。结果：3.0-T DT纤维束成像时，两个CST半球（P <0.001）、右侧SLIT（P = 0.005）、CC（P = 0.01）和右侧穹窿（P = 0.04）的视觉评分较高。在3.0 T时，CST（右侧，P = .008;左侧，P < .001）、SLF（右侧，P = .001;左侧，P = .02）和穹窿（双侧，P = .02）束纤维的数量较多。在3.0 T时，CST的不对称指数较低（P < .001）。左SLF和左穹窿的视觉评分和CC束纤维的数量没有显着different.Conclusion：描述的大多数纤维束在3.0-T DT纤维束成像比描述在1.5-T纤维束成像改善。(c)RSNA，2006年。
Purpose: To prospectively evaluate the depiction of brain fiber tracts at 3.0- versus 1.5-T diffusion-tensor (DT) fiber tractography performed with parallel imaging.Materials and Methods: Institutional review board approval was obtained, and each subject provided written informed consent. Subjects were 30 healthy volunteers (15 men, 15 women; mean age, 28 years; age range, 21-46 years). Single-shot spin-echo echo-planar magnetic resonance (MR) sequences with parallel imaging were applied. Four fiber tracts were reconstructed: corticospinal tract (CST), superior longitudinal fasciculus (SLF), corpus callosum (CC), and fornix. Two neuroradiologists compared 3.0- and 1.5-T tractography in terms of fiber tract depiction by using five depiction scores (scores 0-4) and numbers of reconstructed tract fibers and in terms of lateral asymmetry in the CST by using numbers of reconstructed fibers. The Wilcoxon signed rank test was applied for statistical analysis.Results: Visual scores for both CST hemispheres (P < .001), the right SLIT (P = .005), the CC (P = .01), and the right fornix (P = .04) were higher at 3.0-T DT tractography. Larger numbers of CST (right, P = .008; left, P < .001), SLF (right, P = .001; left, P = .02), and fornix (bilaterally, P = .02) tract fibers were depicted at 3.0 T. The asymmetry index for the CST was lower (P < .001) at 3.0 T. Visual scores for the left SLF and the left fornix and numbers of CC tract fibers were not significantly different.Conclusion: Depiction of most fiber tracts was improved at 3.0-T DT tractography compared with depiction at 1.5-T tractography. (c) RSNA, 2006.