Speyer Renée, Wieneke George H, Kersing Willem, Dejonckere Philippe H
Institute of Phoniatrics, University Medical Center Utrecht, Utrecht, the Netherlands.
Ann Otol Rhinol Laryngol. 2005 Jun;114(6):443-50. doi: 10.1177/000348940511400606.
The reliability of objective measurements on digital laryngeal images was investigated.
The magnitude of the error of measurement of surface areas by visually tracing the outline was determined for three different areas: the area of the lesion and, during vibration, the glottal area on maximal opening of the vocal folds and the glottal area on maximal closing of the vocal folds.
The errors in these areas were 10% to 30%. The results suggest that the error is mainly due to the uncertainty of the real outline of areas with a vague boundary. Correction for differences in magnification between two images (posttherapy and pretherapy) is of importance in about 25% to 65% of cases, depending on the area measured.
Only when the magnification ratio is small (less than about +/- 10% from 1.0) may a correction not be necessary.
研究数字喉镜图像客观测量的可靠性。
通过目视追踪轮廓确定三个不同区域表面积测量的误差大小：病变区域，以及在振动时声带最大张开时的声门区域和声带最大闭合时的声门区域。
这些区域的误差为10%至30%。结果表明，误差主要是由于边界模糊区域实际轮廓的不确定性。根据测量区域的不同，在约25%至65%的病例中，校正两个图像（治疗后和治疗前）之间的放大倍数差异很重要。
只有当放大率较小时（与1.0相比偏差小于约+/-10%），才可能无需校正。
