Publisher：Orthodontics and Craniofacial Research  

DOI： 10.1111/ocr.12371

Scopus

Publisher：(一社)日本摂食嚥下リハビリテーション学会  

【目的】小型3Dカメラによる口唇動作の測定と嚥下造影検査(VF)による嚥下動態の撮影を同時に行い、同期・解析し、嚥下時における口角間距離、嚥下時間ならびに嚥下量の関連性を明らかにする。【方法】小型3Dカメラとして、Microsoft XBox One Kinect Sensor(Kinect)を用いた。Microsoft社から提供された開発ソフトウェアを利用して、対象の顔面形状を自動認識し両側口角部の3次元座標を取得することで、口角間距離を記録できるプログラムを作成した。Kinectによりマネキンの口角間距離を一定の条件下における測定精度と再現性を検証し、被験者を対象とした測定に最も適した条件を検討した。検証結果を基に、試料嚥下時のKinectによる口唇動作とVFによる嚥下動態を同時測定し、ビデオ音声同期ソフトELANにより得られた情報を同期・解析した。対象は、摂食嚥下機能に異常のない成人男性12名(平均年齢27.8±1.2歳)とし、試料は硫酸バリウム混濁液5mL、10mL、15mL、20mLの4種類とした。試料嚥下時における口角間距離の変位量(変位量)と嚥下量、嚥下時間と嚥下量に関して一元配置分散分析、Pearsonの積率相関係数を算出し検討した。試料を口腔内に保持する位置(保持位置)、口唇動作ならびに嚥下量に関してFriedman検定にて検討した。【結果】最適条件(距離120cm/回転角度10°)でのKinectによる測定において、口角間距離は標準偏差±0.52mm、実測値と測定値の差は0.47mmで最も高い精度であった。成人男性での嚥下量と変位量には有意差ならびに相関を認め(p<0.01、r=0.56)、嚥下量と保持位置には有意差を認めた(p<0.01)。しかし、その他の項目に関して、有意差を認められなかった。【結論】本研究により、Kinectによる口角間距離の測定精度と再現性を明らかにした。口唇動作の測定と嚥下動態の撮影を同時に行い、同期・解析が可能となるシステムを構築した。嚥下量と変位量には有意差ならびに相関関係を認め、嚥下量と保持位置には有意差を認めた。一方で、他の項目において有意差は認められなかった。(著者抄録)

Language：English   Publishing type：Research paper (scientific journal)  

Publisher：The Japanese Society of Dysphagia Rehabilitation  

<p>Purpose:　Measurement of lip motion with a compact 3D camera and swallowing dynamics by videofluoroscopy (VF) were performed simultaneously. Synchronization and analysis were performed to clarify the relationship among the distance between angulus oris, swallowing time and swallowing quantity.</p><p>Methods:　The compact 3D camera was the Microsoft XBox One Kinect Sensor^® (Kinect). Development software provided by Microsoft Corporation was used. The face surface of the subject was automatically recognized. A program was created to obtain the three-dimensional coordinates of the both-sides angulus oris and record the distance between the angulus oris. Kinect verified the accuracy and reproducibility of the mannequin distance between the angulus oris under certain conditions.</p><p>We examined the most suitable conditions for the measurement of subjects. Based on the verification results, the information obtained by the video and audio synchronization software ELAN was synchronized and analyzed. The subjects were 12 adult men (average age 27.8±1.2 years) with no abnormal swallowing function. Four types of samples were used: barium sulfate suspension 5 mL, 10 mL, 15 mL, and 20 mL. One-way analysis of variance and Pearson's product-moment correlation coefficient were calculated for the amount of displacement (displacement) and swallowing quantity, swallowing time and swallowing quantity during swallowing. The position of holding the sample in the oral cavity (holding position), lip motion and swallowing quantity were examined by Friedman' s test.</p><p>Results:　The optimum conditions (distance 120 cm, rotation angle 10°). The measurement with Kinect had the highest accuracy, with a standard deviation of ±0.52 mm for the distance between the angulus oris and a difference of 0.47 mm between the measurements with Kinect and the actual measurement. There were significant differences and correlations between swallowing and displacement (<i>p</i>＜0.01, <i>r</i>＝ 0.56). There was a significant difference between swallowing quantity and holding position (<i>p</i>＜0.01). However, with respect to the other items, no significant difference was observed.</p><p>Conclusions:　This study clarified the measurement accuracy and reproducibility of the distance between the angulus oris by Kinect. A system that can measure and synchronize lip motion and swallowing dynamics at the same time was constructed. The swallowing quantity and the displacement were significantly different and correlated, and the swallowing quantity and the holding position were significantly different. On the other hand, there was no significant difference in the other items.</p>

DOI： 10.32136/jsdr.24.1_3

Publisher：Orthodontics and Craniofacial Research  

DOI： 10.1111/ocr.12311

Scopus

Language：Japanese Book type：General book, introductory book for general audience