Abstract
In this work, a three dimensional (3D) convolutional neural network (CNN) model based on image slices of various normal and pathological vocal folds is proposed for accurate and efficient prediction of glottal flows. The 3D CNN model is composed of the feature extraction block and regression block. The feature extraction block is capable of learning low dimensional features from the high dimensional image data of the glottal shape, and the regression block is employed to flatten the output from the feature extraction block and obtain the desired glottal flow data. The input image data is the condensed set of 2D image slices captured in the axial plane of the 3D vocal folds, where these glottal shapes are synthesized based on the equations of normal vibration modes. The output flow data is the corresponding flow rate, averaged glottal pressure and nodal pressure distributions over the glottal surface. The 3D CNN model is built to establish the mapping between the input image data and output flow data. The ground-truth flow variables of each glottal shape in the training and test datasets are obtained by a high-fidelity sharp-interface immersed-boundary solver. The proposed model is trained to predict the concerned flow variables for glottal shapes in the test set. The present 3D CNN model is more efficient than traditional Computational Fluid Dynamics (CFD) models while the accuracy can still be retained, and more powerful than previous data-driven prediction models because more details of the glottal flow can be provided. The prediction performance of the trained 3D CNN model in accuracy and efficiency indicates that this model could be promising for future clinical applications.
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Data Availability Statement
The data that supports the findings of this study are available from the corresponding author upon reasonable request.
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Acknowledgements
This work is supported by the Open Project of Key Laboratory of Computational Aerodynamics, AVIC Aerodynamics Research Institute (Grant No. YL2022XFX0409).
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Zhang, Y., Pu, T., Xu, J. et al. Image-Based Flow Prediction of Vocal Folds Using 3D Convolutional Neural Networks. J Bionic Eng 21, 991–1002 (2024). https://doi.org/10.1007/s42235-023-00466-3
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DOI: https://doi.org/10.1007/s42235-023-00466-3