Result of Laser Cordectomy in Early Glottic Cancer and Observation of Malignant Transformation from Precancerous Lesion

Ahn, Dongbin; Park, Ji Hyun; Heo, Sung Jae; Park, Chang Mook; Jung, Da Jung; Nam, Ye-Mo; Sohn, Jin Ho; Park, June Sik

doi:10.3342/kjorl-hns.2010.53.7.425

Cited by 1 publication

(4 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this study, as shown in Figure 4, threshold segmentation method based automatic quantitative analysis was performed on open quotient (OQ), phase symmetry index (PSI), amplitude symmetry index (ASI), objective parameters of 2D VKG, whose clinical usefulness was verified in previous studies [11,12].…”

Section: Discussionmentioning

confidence: 90%

“…On the other hand, 2D VKG can observe the movement of the entire vocal fold in real time and prevent distortion due to patient movement that occurs in line scanning VKG, and provided both spatial and temporal information in one image at the same time, so intuitive analysis is possible [11,25]. In addition, Since object parameters such as F0, OP, CQ, speed quotient, PSI, ASI, mucosal wave magnitude difference, and glottal area asymmetry index and subjective parameter such as mucosal wave, cycle to cycle variability, absence of vibration, interference of surrounding, lateral peak, medial peak, and cycle aberration can be measured, it can be usefully used for evidence-based intervention [12].…”

Section: Discussionmentioning

confidence: 99%

“…On the other hand, unlike DKG, 2D VKG can observe the movement of the entire vocal fold in real time, thus preventing unnecessary time consuming and objectively measuring specific variables related to vocal fold vibration [11]. Compared to VKG extracting 7,200 lines/s at a resolution of 240 pixels, 2D VKG extracts full HD (1,920 × 1,080 pixels) images at 30 frames/s at 32,400 lines/s.…”

Section: Introductionmentioning

confidence: 99%

“…The tools mentioned above provide spatial or temporal information in various ways, and in order to use this information in clinical practice, a quantitative evaluation capable of quantifying vocal fold vibration characteristics is necessary. VLS [13], VKG [14], HSV [15], DKG [16,17], 2D DKG [10], and other measurement variables for various laryngeal image methods have been studied, and 2D VKG also has absence of vibration of vocal fold, duration of glottal closure, left-right asymmetry, shape of lateral peaks, laterally traveling mucosal wave, opening versus closing duration, shape of medial peak, cycle aberrations Various parameters can be used to measure the characteristics of vocal fold vibration [11,12]. These parameters can be analyzed more effectively using an analysis system.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Automated quantitative analysis of vocal fold vibration using two-dimensional scanning videokymography after transoral laser microsurgery

Bae¹,

Park²

2021

Clin Arch Commun Disord

View full text Add to dashboard Cite

The purpose of this study was to develop a quantitative automated analysis system for two-dimensional videokymography (2D VKG) using the threshold segmentation method, and to analyze the vocal fold vibration characteristics of vocally healthy subjects and patients who underwent CO2 transoral laser microsurgery using this system, and to examine in accuracy differences between automatic and automated analysis methods.Methods: 29 male patients who underwent CO2 transoral laser microsurgery and 10 vocally healthy male participated in the study. Quantitative analysis such as opening quotient (OQ), phase symmetry index (PSI), amplitude symmetry index (ASI) of 2D VKG images was performed using an automated analysis program in which glottal area extraction by the threshold segmentation method and edge detection using a manual plotting technique were mixed.Results: Automatic analysis enabled accurate quantitative analysis in 76.9% (30/39) of the total image. The automated analysis corrected by the manual plotting technique on the sample showing gross error showed higher accuracy than the automatic analysis. The results of automated and automatic analysis were not statistically different in ASI, but there were differences in OQ and PSI. In addition, vocally healthy group and patients group showed statistical significance in all parameters (OQ, ASI, PSI). Conclusions:The 2D VKG, which can evaluate the vibration of the entire vocal fold tissue in real time, can be usefully utilized as a laryngeal imaging technique that visualizes the structure and function of the vocal fold. Quantitative analysis using automated and automatic analysis can increase the clinical usability of 2D VKG.

show abstract

Section: Discussionmentioning

confidence: 90%