An approach to real-time magnetic resonance imaging for speech production
An approach to real-time magnetic resonance imaging for speech production
复制标题
DOI：
10.1121/1.1652588
复制
发表时间：
2004-04-01
影响因子：
2.4
通讯作者：
Byrd, D
中科院分区：
文献类型：
--
作者：
Narayanan, S;Nayak, K;Byrd, D
磁共振成像（MRI）已成为研究言语产生中静态姿势的有价值的工具。现在，时间分辨率的最新改进使得使用MRI检查流利讲话期间声道成形的动态成为可能。本研究在常规GE Signa 1.5-T CV/i扫描仪上使用低翻转角梯度回波脉冲序列进行螺旋k空间采集。这种策略允许每秒8 - 9幅图像的采集速率和每秒20 - 24幅图像的重建速率，使得现在可以制作真实的语音电影。节段持续时间，位置和咬合架时间都可以定量评估。数据显示了嘴唇、舌头和软腭的清晰实时运动。示例电影和数据分析策略。(C)2004年，美国声学学会。
Magnetic resonance imaging (MRI) has served as a valuable tool for studying static postures in speech production. Now, recent improvements in temporal resolution are making it possible to examine the dynamics of vocal-tract shaping during fluent speech using MRI. The present study uses spiral k-space acquisitions with a low flip-angle gradient echo pulse sequence on a conventional GE Signa 1.5-T CV/i scanner. This strategy allows for acquisition rates of 8-9 images per second and reconstruction rates of 20-24 images per second, making veridical movies of speech production now possible. Segmental durations, positions, and interarticulator timing can all be quantitatively evaluated. Data show clear real-time movements of the lips, tongue, and velum. Sample movies and data analysis strategies are presented. (C) 2004 Acoustical Society of America.