Active Cortex Tractography.
Active Cortex Tractography.
复制标题
主动皮质纤维束描记术。
DOI：
10.1007/978-3-030-87234-2_44
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发表时间：
2021-09
期刊：
影响因子：
--
通讯作者：
Yap, Pew-Thian
中科院分区：
文献类型：
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作者：
Wu, Ye;Hong, Yoonmi;Ahmad, Sahar;Yap, Pew-Thian
大多数现有的扩散纤维束成像算法受到脑回偏差的影响，导致流线在脑回冠而不是脑沟银行终止。在本文中，我们提出了一种纤维束成像技术，称为主动皮层纤维束成像（ACT），以克服脑回的偏见，使纤维流线曲线自然进入皮层。我们表明，皮质可以发挥积极的作用，在皮质纤维束成像提供解剖信息，以克服方向模糊的流线进入表面白色物质在回叶片和方法的皮质。这是通过设计一个方向侦察机制，考虑到白色物质表面的法线矢量。侦察机制允许探测空间中更远的方向，以准备流线以适当的角度转向。表面法向量引导流线转向皮质，垂直于白质-灰质界面。使用合成的，猕猴和人类的数据与不同的流线型播种计划的评价表明，ACT改善皮质纤维束成像。
Most existing diffusion tractography algorithms are affected by gyral bias, causing the termination of streamlines at gyral crowns instead of sulcal banks. In this paper, we propose a tractography technique, called active cortex tractography (ACT), to overcome gyral bias by enabling fiber streamlines to curve naturally into the cortex. We show that the cortex can play an active role in cortical tractography by providing anatomical information to overcome orientation ambiguities as the streamlines enter the superficial white matter in gyral blades and approach the cortex. This is achieved by devising a direction scouting mechanism that takes into account the white matter surface normal vectors. The scouting mechanism allows probing of directions further in space to prepare the streamlines to turn at appropriate angles. The surface normal vectors guide the streamlines to turn into the cortex, perpendicular to the white-gray matter interface. Evaluation using synthetic, macaque and human data with different streamline seeding schemes demonstrates that ACT improves cortical tractography.