Related Experiment Video
Updated: Jul 14, 2026
06:24
Manufacturing Process for Non-Adhesive Super-Soft Vocal Fold Models
Published on: January 5, 2024
[Phonovibrogram: vocal fold dynamics integrated within a single image]
1Abteilung für Phoniatrie und Pädaudiologie, Universitätsklinikum Erlangen, Erlangen, Germany. eysholdt@phoni.imed.uni-erlangen.de
HNO
|May 16, 2007
Summary
Phonovibrogram (PVG) analysis of high-speed video imaging simplifies vocal fold motion interpretation. This automated image processing aids in recognizing patterns for better clinical assessment of voice disorders.
Area of Science:
- Laryngology
- Medical Imaging
- Biomedical Engineering
Context:
- Stroboscopy is limited for examining hoarse voices.
- High-speed (HS) video imaging offers better visualization of vocal fold dynamics.
- Offline analysis of video recordings is time-consuming and pattern recognition is challenging.
Purpose:
- To introduce the phonovibrogram (PVG) as an image-processing algorithm.
- To extract and compress vocal fold motions from HS laryngoscopic video into a single image.
- To simplify the interpretation of complex vocal fold dynamics.
Summary:
- The phonovibrogram (PVG) algorithm processes entire laryngoscopic HS video recordings of vocal folds.
- It automatically compresses dynamic motion data into a single, interpretable image.
- PVG reveals distinct, person-specific patterns that can be categorized geometrically, aiding human observers.
Impact:
- PVG facilitates easier recognition and interpretation of vocal fold motion patterns compared to dynamic analysis.
- It enhances the clinical utility of HS laryngoscopic video recordings through automatic image processing.
- PVG shows promise for clinical validation in diagnosing voice conditions.
Related Concept Videos
01:29Assessment of Ventilation II: Respiratory Depth and Rhythm
Respiratory Depth
Respiratory depth measures the volume of air inhaled or exhaled during a breath. It can vary from shallow to deep and typically remains consistent when a person is at rest or asleep. Occasionally, individuals will automatically inhale deeply, known as sighing, which inflates the lungs with more air than normal breathing.
To assess respiratory depth, observe the degree of chest excursion or movement:
Respiratory depth measures the volume of air inhaled or exhaled during a breath. It can vary from shallow to deep and typically remains consistent when a person is at rest or asleep. Occasionally, individuals will automatically inhale deeply, known as sighing, which inflates the lungs with more air than normal breathing.
To assess respiratory depth, observe the degree of chest excursion or movement:
01:05Intensity and Pressure of Sound Waves
The intensity of sound waves can be related to displacement and pressure amplitudes by using their wave expressions and the definition of intensity. The critical step to achieve this is to write the power delivered by the particles on the wave as the product of force and velocity and simplify the force per unit area as the pressure. The velocity of the medium's particles can be derived from the displacement.
Unlike the time average of a sinusoidal term, which is zero since it is positive and...
Unlike the time average of a sinusoidal term, which is zero since it is positive and...
01:12Double Resonance Techniques: Overview
Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or radiofrequency pulses to manipulate and observe two distinct nuclear spins. One important application of double resonance is spin decoupling, which selectively suppresses coupling with one type of nucleus while observing the NMR signal from another nucleus, simplifying the spectrum and enhancing resolution.
Spin decoupling is usually achieved by...
Spin decoupling is usually achieved by...
01:08IR Spectrum Peak Splitting: Symmetric vs Asymmetric Vibrations
Identical bonds within a polyatomic group can stretch symmetrically (in-phase) or asymmetrically (out-of-phase). Similar to hydrogen bonding, these vibrations also influence the shape of the IR peak. Generally, asymmetric stretching frequencies are higher than symmetric stretching frequencies. For example, primary amines exhibit two distinct IR peaks between 3300–3500 cm−1 corresponding to the symmetric and asymmetric N-H stretching, while secondary amines exhibit a single stretching vibration...
01:24Imaging Studies II: Ultrasonography
IntroductionUltrasonography, or renal ultrasound, is a noninvasive medical imaging technique that uses high-frequency sound waves to visualize the kidneys, ureters, bladder, and surrounding tissues.Indications for Urinary System UltrasonographyUrinary system ultrasonography is indicated in various clinical scenarios, such as:Kidney Stones (Urolithiasis): To detect and monitor the size and presence of kidney or urinary tract stones.Hydronephrosis: To assess the dilation of the renal pelvis and...
01:17Ultrasonography
Ultrasonography is an imaging technique that uses high-frequency sound waves to visualize the body's internal structures. It is a non-invasive and safe procedure that does not involve the use of ionizing radiation, making it widely used in various medical fields. Ultrasonography is used to study heart function, blood flow in the neck or extremities, certain conditions such as gallbladder disease, and fetal growth and development.
During an ultrasonography procedure, a handheld device called a...
During an ultrasonography procedure, a handheld device called a...