Time domain optical coherence tomography is a useful tool for diagnosing otitis media with effusion

Shilyagin, Pavel A.; Novozhilov, Alexey; Abubakirov, T. E.; Gelikonova, Valery; Терпелов, Д. А.; Matkivsky, V. A.; Геликонов, Г. В.; Шахов, А. В.; Gelikonov, Valentin M.

doi:10.1088/1612-202x/aacb4c

Cited by 9 publications

(4 citation statements)

References 14 publications

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“…The coherence gate may be fast shifted the entire ±10 mm region from the initial point to provide the possibility of proper object localization along the probing axis. A distinctive feature of the device [11] from the previously developed is the ability to register OCT in both the standard 3D and slow axis M-mode [12]. This provides the ability of some dynamic properties of liquid suspended scatterers detection.…”

Section: Methodsmentioning

confidence: 99%

Differential geometric approach for automated eardrum thickness measurement in OCT image processing

Matkivsky¹,

Shilyagin²,

Moiseev³

et al. 2020

Laser Phys. Lett.

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We propose a method for the automated in vivo thickness measurement of the human eardrum in OCT imaging. The method is based on extraction curvilinear structures using eigenvectors and eigenvalues of smoothing image Hessian (Steger method). This allows for extracting the central line of the eardrum and calculating the normal to each point. The latter circumstance makes it possible to find the proper thickness of an arbitrarily oriented eardrum having a complex shape. The algorithm works correctly despite the presence of other image elements complicating the central line and borders extraction process (presence of an effusion or structures with bright borders-bones). The algorithm does not require large computing power and can be applied to real time image processing. In addition, a comparison of the effectiveness of the proposed method with a Canny edge detector is given.

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Section: Methodsmentioning

confidence: 99%

Differential geometric approach for automated eardrum thickness measurement in OCT image processing

Matkivsky¹,

Shilyagin²,

Moiseev³

et al. 2020

Laser Phys. Lett.

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show abstract

“…The working distance of the probe is 25 mm ± 10 mm to satisfy various ear geometries. The coherence gate may be fast shifted entire ±10 mm region from the initial point to provide the possibility of proper object localization along the probing axis [10,11]. This provides the ability of some dynamic properties of liquid suspended scatterers detection.…”

Section: Oct Devicementioning

confidence: 99%

Low-scattering volumes visualisation from optical coherence tomography data and its applications in otolaryngology

Moiseev¹,

Shilyagin²,

Novozhilov³

et al. 2020

Laser Phys. Lett.

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“…This is illustrated in Figure 3 (b), which reflects the section shown by the dash-dotted line in Figure 3 Due to the fact that individual scatterers in a fluid are movable, they are involved in the Brownian motion; as a result, the speckles in the "liquid" part of the image (exudate) have a shorter horizontal length compared to the speckles of the "hard" structure. Evaluation of speckle brightness and mobility can provide information about the viscosity of the exudate and help choose the treatment tactics (conservative or surgical) [22,23]. However, a difference in the speckle lengths (their mobility) can be measured only if the scanning pattern is stable; then the inverse value of the image length would reflect the real mobility of the scatterers and not artificial vibrations during the scanning.…”

Section: Stabilization Of the Continuous Raster 3d Scanning In Octmentioning

confidence: 99%

Stabilization of the Scanning Pattern for Three-Dimensional Phase-Sensitive OCT Modalities: Angiography, Relaxography, and Monitoring of Slow Processes

Shilyagin¹,

Matveev²,

Kiseleva³

et al. 2019

Sovrem Tehnol Med

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New modalities of optical coherence tomography (OCT) are based not only on the analysis of light beam scattering by biological tissues, but also, to a greater extent, on the assessment of spatio-temporal changes in the speckle structure (both the amplitude and the speckle phase). The aim of the study was to develop a method for eliminating parasitic vibrations in the scanning system, which interfere with the new OCT modalities such as angiography, relaxography, and slow process monitoring. Materials and Methods. The task of stabilizing the beam scan trajectory was successfully solved by actively filtering the controlling voltage. Results. The effect of the proposed approach application is demonstrated both on a phantom sample and examples of implementation of several modalities applied to real tissues, including: exudate visualization in vivo; OCT-angiography for visualization of microcirculation of the brain; OCT-relaxography on the example of mapping the time of mechanical relaxation of cartilage tissue; increasing the lateral resolution of OCT by compensating for defocusing. Conclusion. Vibrations of the scanning system cause artifact speckle variations that mask the informative variations of the speckles due to the relative change of the position of the scatterers inside the biological tissue caused by Brownian motion, flow, and deformation. Without proper stabilization of the scanning pattern, it is impossible to implement these modalities with quality suitable for practical use.

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Time domain optical coherence tomography is a useful tool for diagnosing otitis media with effusion

Cited by 9 publications

References 14 publications

Differential geometric approach for automated eardrum thickness measurement in OCT image processing

Differential geometric approach for automated eardrum thickness measurement in OCT image processing

Low-scattering volumes visualisation from optical coherence tomography data and its applications in otolaryngology

Stabilization of the Scanning Pattern for Three-Dimensional Phase-Sensitive OCT Modalities: Angiography, Relaxography, and Monitoring of Slow Processes

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