Medical video recording

Part IV: High-speed camera


Author: MSc Anna Racino, Ph.D. Marcin Just, Ph.D. Michał Tyc (DiagNova Technologies)
Date: 2019.07.01

The basic differences between the techniques of high-speed video and stroboscopy are presented in table 1. It includes the column "high-speed video in the past" - referring to high-speed cameras available on the market so far, and "high-speed video now" - referring to the high-speed ALI Cam camera from DiagNova .

The main features of stroboscopy that contributed to its dissemination were the low cost and ease of testing compared to early versions of the high-speed camera. The price difference has faded significantly, especially with the higher quality stroboscope sets. In particular, strobe sets offering HD image are currently even more expensive than the set with a fast camera offered on the Polish market, and it also offers HD image in general visualization mode.The high-speed camera examination is now easier and faster to perform than the strobe examination. The only limitation is that a fiberscope cannot be used in this case.

    The main features of high-speed camera diagnostics are:
  • the ability to diagnose pathological conditions with the occurrence of irregularities in vibrations,
  • credibility of the examination - no risk of distorting the result, which often happens when diagnosing pathology with a stroboscope,
  • much faster and possible for each case making kymographic sections, which enable faster and more reliable diagnostics and reliable documentation for the purposes of, for example, occupational medicine,
  • the possibility of analyzing the non-uniformity of phonation vibrations on the basis of a large number of cycles of work of the vocal folds;

These features predestine the high-speed camera examination to act as the main examination at the clinical or rehabilitation level. In turn, stroboscopic examination should evolve towards screening performed in order to qualify for more accurate diagnostics with the use of high-speed camera.

Table. 1. Comparison of the high-speed video technique and stroboscopy

Stroboscopy High-speed video in the past High-speed video now
Documentation and archiving of the examination /
difficult processing, limitations of the recording length
Overall assessment of laryngeal morphology /
(HD mode)
Low cost /
similar to strobo HD
Easy to do the examination /
Comfort of examination
Advanced analysis /
for selected cases, strobokymography
No need to sync with your voice
No risk of obtaining a false image of the work of the vocal folds
Very short phonations can be registered
Possibility of recording beginnings and ends of phonation
Possibility to evaluate high singing voices /
vibrato makes it difficult to obtain the correct strobe effect
difficulty registering voices above 400 Hz
difficulty registering voices above 400 Hz
Assessment of laryngeal function for regular vibrations Symmetry
Vibration frequency
Mucosal wave
Opening rate
Assessment of the cyclicity of vibrations
not enough periods
Assessment of laryngeal function for irregular vibrations Symmetry
Amplitude /
Vibration frequency
Mucosal wave
Irregularity assessment
Pseudo-glotis work assessment