Yeung Andy Wai Kan, Tanaka Ray, Ho Jeremy Ka Chun, Li Jennifer Qianfeng, Jacobs Reinhilde, Bornstein Michael M
Oral and Maxillofacial Radiology, Applied Oral Sciences, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR, China
Orthodontics, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR, China
Swiss Dent J. 2019 Jul 22;129(7-8):562-570. doi: 10.61872/sdj-2019-07-08-543. Epub 2019 Jun 6.
This study aimed to evaluate patient-, software-, and observer-related factors influencing the time required for volumetric measurements of maxillary sinuses using cone beam computed tomography (CBCT) and a commercially available software. The volumes of healthy bilateral maxillary sinuses of adult patients from CBCT images taken during a 15-month study period were measured using dedicated software by two observers. The time required for volumetric assessments was evaluated statistically with respect to the potential influence of gender, age, sinus side, sinus volume, sequence of measurement, and selection threshold of the software. The resulting average sinus volume of the 174 sinuses from 87 patients was 16.9 cm3. The average time required to measure one sinus volume was 91.8 s. Sinuses from male patients required a longer time (median of 95.5 s) for the measurements than their female counterparts (median of 87.5 s). Measurement time increased with increasing age, sinus volume and selection threshold based on calculated grey values provided by the software. The volumetric measurements and measurement times exhibited a high intra-observer agreement. The volumetric measurements were highly reproducible. Each measurement was completed within 4 minutes, though there was a marked difference in the mean measurement time between the two observers. Semi-automated volumetric measurement of the maxillary sinus with commercially available software is feasible, efficient, and reproducible. Based on these favorable findings, practitioners might consider using such volumetric instead of linear measurements to plan and analyse outcomes of sinus grafting procedures in daily clinical practice.
本研究旨在评估患者、软件和观察者相关因素对使用锥形束计算机断层扫描（CBCT）和商用软件对上颌窦进行容积测量所需时间的影响。在为期15个月的研究期间，两名观察者使用专用软件对成年患者CBCT图像中健康双侧上颌窦的容积进行了测量。针对性别、年龄、鼻窦侧别、鼻窦容积、测量顺序和软件选择阈值的潜在影响，对容积评估所需时间进行了统计学评估。87例患者的174个鼻窦的平均鼻窦容积为16.9立方厘米。测量一个鼻窦容积的平均时间为91.8秒。男性患者鼻窦的测量时间（中位数为95.5秒）比女性患者（中位数为87.5秒）更长。测量时间随着年龄、鼻窦容积以及基于软件提供的计算灰度值的选择阈值的增加而增加。容积测量和测量时间在观察者内部具有高度一致性。容积测量具有高度可重复性。每次测量均在4分钟内完成，不过两名观察者之间的平均测量时间存在显著差异。使用商用软件对上颌窦进行半自动容积测量是可行、高效且可重复的。基于这些有利发现，临床医生在日常临床实践中规划和分析鼻窦移植手术的结果时，可能会考虑使用这种容积测量而非线性测量方法。
