Functional MRI of brain activation induced by scanner acoustic noise
Functional MRI of brain activation induced by scanner acoustic noise
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DOI：
10.1002/mrm.1910390311
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发表时间：
1998-03-01
影响因子：
3.3
通讯作者：
Hyde, JS
中科院分区：
文献类型：
--
作者：
Bandettini, PA;Jesmanowicz, A;Hyde, JS
介绍了一种方法，通过该方法可以绘制由与平面回波成像（EPI）相关的声学噪声引起的大脑激活。比较了两种类型的时间序列。第一个时间序列被认为是“任务”，涉及仅应用 EPI 梯度 20 a，而不应用 RF 脉冲，然后，不间断地开始图像收集。第二个被认为是“控制”，涉及典型的连续图像采集，而无需先前的梯度脉冲。两个时间序列前 5 秒的细分显示信号增强主要在初级听觉皮层。该技术使用模仿假设的扫描仪噪声诱导激活的运动皮层任务进行了验证。
A method is introduced by which brain activation caused by the acoustic noise associated with echo planar imaging (EPI) is mapped. Two types of time series were compared. The first time series, considered the "task," involved applying only EPI gradients for 20 a without the application of RF pulses, then, without pause, starting image collection. The second, considered the "control," involved typical sequential image acquisition without the prior gradient pulses. Subfraction of the first 5 s of the two time series revealed signal enhancement mainly in the primary auditory cortex. The technique was validated using a motor cortex task that mimicked the hypothesized scanner noise induced activation.