Department of Neuroradiology, Ludwig Maximilians University, Munich, Germany.
Clin Neuroradiol. 2010 Dec;20(4):223-9. doi: 10.1007/s00062-010-0029-2. Epub 2010 Sep 21.
The authors investigated the potential of a 32-channel (32ch) receiving head coil for functional magnetic resonance imaging (fMRI) compared to a standard eight-channel (8ch) coil using a motor task.
Brain activation was analyzed in 14 healthy right-handed subjects performing finger tapping with the right index finger (block design) during two experimental sessions, one with the 8ch and one with the 32ch coil (applied in a pseudorandomized order). Additionally, a phantom study was performed to compare signal-to-noise ratios (SNRs) of both coils.
During both fMRI sessions, analysis of motor conditions resulted in an activation of the left "hand knob" (precentral gyrus). Application of the 32ch coil obtained additional activation clusters in the right cerebellum, left superior frontal gyrus (SMA), left supramarginal gyrus, and left postcentral gyrus. The phantom study revealed a significantly higher SNR for the 32ch coil compared to the 8ch coil in superficial cortical areas located near the surface of the brain.
The 32ch technology has a potential impact on fMRI studies, especially in paradigms that result in activation of cortical areas located near the surface of the brain.
作者使用运动任务研究了 32 通道（32ch）接收头线圈在功能磁共振成像（fMRI）中的潜力，与标准的 8 通道（8ch）线圈相比。
14 名健康的右利手受试者在两个实验过程中进行了手指敲击（block 设计），一次使用 8ch 线圈，一次使用 32ch 线圈（以伪随机顺序应用）。此外，还进行了一项仿体研究，以比较两种线圈的信噪比（SNR）。
在两次 fMRI 会话期间，运动条件的分析导致左“手旋钮”（中央前回）的激活。应用 32ch 线圈在右小脑、左额上回（SMA）、左缘上回和左后中央回中获得了额外的激活簇。仿体研究显示，32ch 线圈在位于大脑表面附近的浅层皮质区域的 SNR 明显高于 8ch 线圈。
32ch 技术对 fMRI 研究具有潜在影响，特别是在导致位于大脑表面附近的皮质区域激活的范式中。
