Biomechanics of the Cricoarytenoid Joint: Three-Dimensional Imaging and Vector Analysis

Storck, Claudio; Juergens, P.; Fischer, Claude; Wolfensberger, Markus; Honegger, F.; Sorantin, Erich; Friedrich, Gerhard; Gugatschka, Markus

doi:10.1016/j.jvoice.2010.03.005

Cited by 17 publications

(17 citation statements)

References 12 publications

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“…In the current work, rather than using EMG, we propose a noninvasive technique, namely three‐dimensional (3D) imaging of the laryngeal cartilages derived from high‐resolution computed tomography (HRCT) scans obtained during singing. We have used this technique successfully in the study of various aspects of laryngeal biomechanics . The aim of this work is to contribute to the current knowledge about the role that laryngeal muscles play in pitch control and how trained singers raise their pitch in the lower and upper parts of the vocal range.…”

Section: Introductionmentioning

confidence: 99%

3D analysis of the movements of the laryngeal cartilages during singing

et al. 2016

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Section: Introductionmentioning

confidence: 99%

3D analysis of the movements of the laryngeal cartilages during singing

et al. 2016

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“…Vector analysis has been used in some research [11, 19, 20], but this study represents the first time that a vector has been used to define the position of the eyeball in TED. A 3D vector can give a more comprehensive and intuitive view of the globe position.…”

Section: Discussionmentioning

confidence: 99%

A Novel Three-Dimensional Vector Analysis of Axial Globe Position in Thyroid Eye Disease

Guo

Qian

Yuan

et al. 2017

Journal of Ophthalmology

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Purpose. To define a three-dimensional (3D) vector method to describe the axial globe position in thyroid eye disease (TED). Methods. CT data from 59 patients with TED were collected and 3D images were reconstructed. A reference coordinate system was established, and the coordinates of the corneal apex and the eyeball center were calculated to obtain the globe vector ECtrue→. The measurement reliability was evaluated. The parameters of ECtrue→ were analyzed and compared with the results of two-dimensional (2D) CT measurement, Hertel exophthalmometry, and strabismus tests. Results. The reliability of ECtrue→ measurement was excellent. The difference between ECtrue→ and 2D CT measurement was significant (p = 0.003), and ECtrue→ was more consistent with Hertel exophthalmometry than with 2D CT measurement (p < 0.001). There was no significant difference between ECtrue→ and Hirschberg test, and a strong correlation was found between ECtrue→ and synoptophore test. When one eye had a larger deviation angle than its fellow, its corneal apex shifted in the corresponding direction, but the shift of the eyeball center was not significant. The parameters of ECtrue→ were almost perfectly consistent with the geometrical equation. Conclusions. The establishment of a 3D globe vector is feasible and reliable, and it could provide more information in the axial globe position.

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“…MRI has a lower resolution, and CT scanner necessitates radiation exposure and post-acquisition software–based interpretation 16,17,18,19,20. Both these imaging techniques are costly and do not allow for the examination of patients under physiological conditions.…”

Section: Discussionmentioning

confidence: 99%

The larynx ruler to measure height and profile of vocal folds: a proof of concept

Desuter¹,

Mertens²,

Delchambre³

et al. 2017

MDER

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IntroductionGlottic leakage during phonation is a direct consequence of unilateral vocal fold (VF) paralysis. This air leakage can be in the horizontal plane and in the vertical plane. Presently, there is no easily applicable medical device allowing noninvasive, office-based measurement of the relative vertical position of the VFs. The larynx ruler (LR) is a laser-based measuring device that could meet the previously stated need, using a flexible endoscope. This study represents a proof of concept regarding the use of the LR in assessing VF relative positions in the vertical plane.Materials and methodsOne fresh male human cadaver larynx, free of neurologic and anatomic disease, was explored with the LR system through the operative channel of a flexible gastroenterology video-endoscope. The tip of the video-endoscope was located in the laryngeal vestibule. The right crico-arytenoid joint was posteriorly disarticulated. Tilting of the VF was obtained by pulling or pushing the arytenoid cartilage with a mosquito forceps fixed to the stump of the previously sectioned superior tip of the posterior crico-arytenoid muscle allowing anterior and posterior tilting of the arytenoid cartilage in order to induce an elevation or a depression of the VF process. Ten “push” and ten “pull” sessions were performed. The distance from the tip of the video-endoscope to each illuminated pixel of the laser beam was recorded. The level difference between the left and right VFs was measured for each recording.ResultsData provided by the LR were consistently in accordance with the movements applied on the VFs. The accuracy of 0.2 mm of the LR is compatible with the envisioned applications for the human larynx.ConclusionThe LR system represents a feasible technique to evaluate respective vertical position of VFs in the human larynx. Technical limitations were identified that will require improvements before experimental use on human beings.

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Biomechanics of the Cricoarytenoid Joint: Three-Dimensional Imaging and Vector Analysis

Cited by 17 publications

References 12 publications

3D analysis of the movements of the laryngeal cartilages during singing

3D analysis of the movements of the laryngeal cartilages during singing

A Novel Three-Dimensional Vector Analysis of Axial Globe Position in Thyroid Eye Disease

The larynx ruler to measure height and profile of vocal folds: a proof of concept

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