Golay Xavier, Jiang Hangyi, van Zijl Peter C M, Mori Susumu
Department of Radiology, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, USA.
Magn Reson Med. 2002 May;47(5):837-43. doi: 10.1002/mrm.10143.
High-resolution cardiac-gated 3D diffusion tensor imaging (3D-DTI) is demonstrated in vivo for several areas of the human brain. Anatomical mapping of subcortical white matter (WM), as well as definition and identification of major WM bundles from the brainstem were performed in humans for the first time using this technique. Improved intrinsic signal-to-noise ratio (SNR) and relatively reduced sensitivity to physiological motion (e.g., brain pulsations) with respect to cardiac-gated multislice acquisition are demonstrated. The advantages and weaknesses of this approach are discussed.
高分辨率心脏门控三维扩散张量成像（3D-DTI）已在人体大脑的多个区域进行了活体演示。首次使用该技术对人类大脑皮质下白质（WM）进行了解剖定位，并对脑干中的主要WM束进行了定义和识别。相对于心脏门控多层采集，该技术显示出更高的固有信噪比（SNR），并且对生理运动（如脑搏动）的敏感性相对降低。本文讨论了这种方法的优缺点。
