2D Scanning Videokymography for Vocal Fold Vibration Analysis
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Solution Overview
Problem
Current methods for analyzing vocal-fold mucosa vibrations, such as laryngeal stroboscopy and line scanning videokymography, fail to accurately assess the entire vocal fold area in real-time, leading to incomplete and subjective evaluations, especially in cases of aperiodic dysphonia and vocal fold abnormalities.
Innovation Solution
A 2D scanning videokymography system comprising a laryngoscope, a Xenon continuous light source, a rolling shutter video camera, and analysis software that captures and analyzes the entire vocal fold area in real-time, providing normalized indexes like average width, glottis opening ratio, and vibration symmetry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If laryngeal stroboscopy is used to observe vocal fold vibration, then vibration can be visualized, but the entire vocal fold area cannot be accurately assessed and only qualitative description is possible
Solution Approach 1:
The patent transitions from conventional 2D stroboscopic imaging to 3D volumetric imaging of the vocal folds. By capturing images from multiple angles and reconstructing three-dimensional data, the system enables comprehensive assessment of the entire vocal fold area including depth information, thereby resolving the limitation of partial observation in traditional methods.
Solution Approach 2:
The imaging system is designed to perform multiple functions: it can visualize vocal fold vibration, assess the entire vocal fold area, provide quantitative measurements, and generate both 2D and 3D representations. This multi-functional capability eliminates the need for separate qualitative and quantitative assessments required by traditional stroboscopy.
2Productivity
If line scanning videokymography is used to capture vocal fold motion, then consecutive frames can be acquired, but only a part of the vocal fold (one line) can be observed
Solution Approach 1:
The system expands from line scanning (1D) to area scanning (2D) and volumetric imaging (3D). By using a two-dimensional array of detectors and coordinating multiple scanning lines, the system captures the entire vocal fold area in real-time while maintaining high temporal resolution for vibration analysis.
Solution Approach 2:
The patent combines multiple scanning lines into a comprehensive two-dimensional image. By rapidly sequentially scanning multiple lines and synthesizing the data, the system achieves both real-time processing capability and complete area coverage, merging the advantages of temporal resolution with spatial completeness.
3Device complexity
If conventional imaging methods are used, then equipment is simpler, but detailed motion of specific parts of vocal-fold mucosa cannot be individually identified
Solution Approach 1:
The imaging system divides the vocal fold area into multiple scan lines and detector elements. Each detector element independently captures motion information from its specific region, enabling individual identification of local vibrations. The segmented data can then be reconstructed into comprehensive images or analyzed independently for localized assessment.
Data Source
AI summary
Disclosed is a 2D scanning videokymography system for analyzing a vibration of vocal-fold mucosa, including: a laryngoscope for observing vocal folds; a light source for illuminating the vocal folds; a video camera for recording and storing images observed through the laryngoscope; a computer incorporating an image capture unit for converting a video signal transmitted from the video camera into a digital image signal, a storage unit for storing the digital image signal, a control unit for analyzing the image signal of the storage unit and displaying the analysis results on a monitor, and analysis software for analyzing the image signal of the storage unit; and a monitor for displaying a captured image and analysis results.