Three-dimensional spiral fMRI technique: A comparison with 2D spiral acquisition
Three-dimensional spiral fMRI technique: A comparison with 2D spiral acquisition
复制标题
DOI：
10.1002/mrm.1910390112
复制
发表时间：
1998-01-01
影响因子：
3.3
通讯作者：
Glover, GH
中科院分区：
文献类型：
--
作者：
Lai, S;Glover, GH
采用BOLD对比度和4.25 min手指敲击任务范式对3D和2D螺旋k空间fMRI技术进行了比较研究。3D序列使用传统的2D螺旋技术，在切片选择方向上结合傅立叶相位编码。比较的特征包括图像外观、信噪比（SNR）、波动噪声、功能对比噪声比（fCNR）、检测到的激活区域、流入效应和大血管受累。结果表明，在总扫描时间恒定的情况下，3D螺旋采集具有较高的SNR和fCNR，尽管其波动噪声略高。薄片非相干平均的能力是3D优于2D的另一个优点。有了这些优点，以及其内在的能力，连续切片和图像重新格式化，三维螺旋功能磁共振成像技术可能是上级，其二维对应。
A comparison study was performed of 3D and 2D spiral k-space fMRI techniques using BOLD contrast with a 4.25-min finger-tapping task paradigm, The 3D sequence uses the conventional 2D spiral technique in conjunction with Fourier phase encoding in the slice select direction. Characteristics that were compared included image appearances, signal-to-noise ratio (SNR), fluctuation noise, functional contrast-to-noise ratio (fCNR), detected activation areas, inflow effect, and large vessel involvement, The results showed that, with constant total scan time, the 3D spiral acquisition has higher SNR and fCNR despite its slightly higher fluctuation noise. The capability for thin-slice incoherent averaging is a further advantage of 3D over 2D. With these advantages as well as its intrinsic ability for contiguous slices and image reformatting, the 3D spiral fMRI technique may be superior to its 2D counterpart.