Development of visual feedback speech therapy technique based on four-dimensional tongue movement model using ultrasound

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It is well-known that patients with oral disorders often exhibit speech sound disorders, and speech therapy for these patients is drawing attention.However, the therapy technique has not been well established. In this study, tongue movements during speech in patients with lateral articulation and glossectomy were demonstrated using ultrasound. Moreover, a three-dimensional tongue surface model was constructed, and provided insight into possible future clinical application.