A technique to reduce motion artifact for externally triggered cine-MRI(EC-MRI) based on detecting the onset of the articulated word with spectral analysis.
A technique to reduce motion artifact for externally triggered cine-MRI(EC-MRI) based on detecting the onset of the articulated word with spectral analysis.
复制标题
一种减少外部触发电影 MRI (EC-MRI) 运动伪影的技术，该技术基于通过频谱分析检测发音词的起始位置。
DOI：
10.2463/mrms.11.273
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
K. Murase
中科院分区：
文献类型：
--
作者：
Y. Shimada;Hironori Nishimoto;T. Kochiyama;I. Fujimoto;Hiroaki Mano;S. Masaki;K. Murase
在用于语音器官动态观察的外部触发电影磁共振成像（EC-MRI）中的一个问题是在数据采集期间由语音的不稳定重复引起的相位编码方向上的运动伪影。我们提出了一种技术，以减少这样的伪影，通过重新安排的k空间数据用于重建MR图像的基础上记录的语音声音的分析。我们在EC-MRI期间记录了受试者的语音，并使用事后声学处理来减少扫描噪声，并基于对记录的声音的分析来检测每个话语的开始。我们从几个数据采集会话中选择k空间的每条线，并根据分析的发音起始时间重新排列它们以重建一系列新的动态MR图像。对比评价表明，该方法重建的动态MR图像中的运动伪影信号显着减少。重建图像的质量足以观察语音产生机制的动态方面。
One issue in externally triggered cine-magnetic resonance imaging (EC-MRI) for the dynamic observation of speech organs is motion artifact in the phase-encoding direction caused by unstable repetitions of speech during data acquisition. We propose a technique to reduce such artifact by rearranging the k-space data used to reconstruct MR images based on the analysis of recorded speech sounds. We recorded the subject's speech sounds during EC-MRI and used post hoc acoustical processing to reduce scanning noise and detect the onset of each utterance based on analysis of the recorded sounds. We selected each line of k-space from several data acquisition sessions and rearranged them to reconstruct a new series of dynamic MR images according to the analyzed time of utterance onset. Comparative evaluation showed significant reduction in motion artifact signal in the dynamic MR images reconstructed by the proposed method. The quality of the reconstructed images was sufficient to observe the dynamic aspects of speech production mechanisms.
影响因子：
2.4
作者：
Narayanan, S;Nayak, K;Byrd, D
通讯作者：
Byrd, D
影响因子：
2.5
作者：
T. Baer;J. Gore;S. Boyce;P. W. Nye
通讯作者：
T. Baer;J. Gore;S. Boyce;P. W. Nye