Application of cine MRI for the development of computerized evaluation system for articulation disorders

口腔颌面部病变引起的语言障碍是临床医生基于听觉印象的主观评价来诊断的。本研究的目的是开发一种计算机诊断系统，用于主观评估关节障碍。本文收集了2005 ~ 2006年腭咽功能不全患者、舌切除术患者和正常儿童的MR和声学检查结果。为了阐明鼻高音的知觉诊断与其生理相关的关系，我们使用日语元音/i/进行了实验。结果表明，F2量级的减小以及F2和F3之间的下降与鼻腔的过度声耦合有关（Kozaki 2005）。对日语辅音[s][sh]的儿童的声学特征进行了澄清，特别是在缺乳门牙的阶段（Sugiyama 2006）。为了研究声道形状对语音频谱的影响，测量了声道形状并估计了声道模型的VTTF。因此，有口腔病变的声道形状与正常声道不同（Nishimoto 2006）。最后，我们尝试了基于三维生理舌模型的舌切断术后的运动估计，仿真结果证明，所开发的模型可以作为研究舌病理语言障碍的有用工具（Fujita 2007）。

Speech disorders caused by oral and maxillofacial lesions are diagnosed by clinicians based on subjective evaluation using auditive impression. The purpose of this research is developing the computerized diagnosis system for the subjective evaluation of articulation disorders.From 2005 to 2006 the results of MR and Acoustic results in velopharyngeal incompetence patients and glossectomee and normal children were obtained.To clarify the relationship between the perceptual diagnoses of hypernasality and its physical correlates experiments were conducted using Japanese vowel /i/. As results the decrease in the magnitude of F2 and the dip between F2 and F3 are related to excessive acoustic coupling of the nasal cavity (Kozaki 2005). The acoustic characteristics of children of the Japanese consonants [s][sh], especially focused on the stage of missing deciduous incisors were clarified (Sugiyama 2006). The vocal tract shapes are measured and the VTTF of vocal tract model are estimated, in order to investigate effects of vocal tract shapes on the spectrum of speech sound. As a result vocal tract shapes having oral lesions are different from normal one (Nishimoto 2006). Finally we tried the estimation of movements after Glossectomy based on 3D physiological tongue model and the simulations proved that developed model can be a useful tool for the study of speech disorders with pathology of the tongue (Fujita 2007)