Improved imaging of lingual articulation using real-time multislice MRI.
Improved imaging of lingual articulation using real-time multislice MRI.
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DOI：
10.1002/jmri.23510
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发表时间：
2012-04
影响因子：
4.4
通讯作者：
Nayak, Krishna S.
中科院分区：
文献类型：
--
作者：
Kim, Yoon-Chul;Proctor, Michael I.;Narayanan, Shrikanth S.;Nayak, Krishna S.
开发一种实时成像技术，允许在多个扫描平面中同时可视化声道成形，并提供复杂发音特征的动态可视化。使用定制的实时成像平台实现多个切片的同时成像。使用快速螺旋梯度回波脉冲序列对人体上气道的正中矢状、冠状和轴向扫描平面进行规定和实时成像。两名母语为英语的人在对称的最大对比元音/a_a/、/i_i/和/u_u/中产生了清擦音和浊擦音/f/-/v/、/θ/-//、/s/-/z/、//-//。声道视频同步与噪声消除的音频录音，促进与英语摩擦音的生产帧的选择。在后元音背景下，从与后齿槽区相交的冠状切片观察到的舌槽在摩擦音产生过程中最为明显，并且对于/s/-/z/比/s/-/z/更明显。轴向切片最好地揭示了背和咽关节的差异;观察到在咽气道中产生较大的横截面积的浊摩擦音。自旋的部分饱和提供了成像平面相对于彼此的精确位置。多个交叉切片的实时MRI可以提供关于声道成形的有价值的空间和时间信息，包括从单个切片观察不到的细节。
To develop a real-time imaging technique that allows for simultaneous visualization of vocal tract shaping in multiple scan planes, and provides dynamic visualization of complex articulatory features. Simultaneous imaging of multiple slices was implemented using a custom real-time imaging platform. Midsagittal, coronal, and axial scan planes of the human upper airway were prescribed and imaged in real-time using a fast spiral gradient-echo pulse sequence. Two speakers of native English produced voiceless and voiced fricatives /f/-/v/, /θ/-/ð/, /s/-/z/, /ʃ/-/ʒ/ in symmetrical maximally contrastive vocalic contexts /a_a/, /i_i/, and /u_u/. Vocal tract videos were synchronized with noise-cancelled audio recordings, facilitating the selection of frames associated with production of English fricatives. Tongue grooving was observed from the coronal slice intersecting the post-alveolar region to be most pronounced during fricative production in back vowel contexts, and more pronounced for sibilants /s/-/z/ than for /ʃ/-/ʒ/. The axial slice best revealed differences in dorsal and pharyngeal articulation; voiced fricatives were observed to be produced with a larger cross-sectional area in the pharyngeal airway. Partial saturation of spins provided accurate location of imaging planes with respect to each other. Real-time MRI of multiple intersecting slices can provide valuable spatial and temporal information about vocal tract shaping, including details not observable from a single slice.
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影响因子：
14.9
作者：
Bresch, Erik;Kim, Yoon-Chul;Narayanan, Shrikanth
通讯作者：
Narayanan, Shrikanth
影响因子：
2.4
作者：
Bresch, Erik;Nielsen, Jon;Narayanan, Shrikanth
通讯作者：
Narayanan, Shrikanth
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
作者：
Demolin, D;Hassid, S;Soquet, A
通讯作者：
Soquet, A
影响因子：
2.4
作者：
Proctor, Michael I.;Shadle, Christine H.;Iskarous, Khalil
通讯作者：
Iskarous, Khalil