Automatic measurement of mandibular cortical bone width on cone-beam computed tomography images
Automatic measurement of mandibular cortical bone width on cone-beam computed tomography images
复制标题
锥形束计算机断层扫描图像上下颌骨皮质骨宽度的自动测量
DOI：
10.1007/s11282-020-00469-4
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发表时间：
2020
期刊：
影响因子：
2.2
通讯作者：
Koyama Shuji
中科院分区：
文献类型：
--
作者：
Mizukuchi Takashi;Naitoh Munetaka;Hishikawa Toshimitsu;Nishida Satoshi;Mitani Akio;Ariji Eiichiro;Koyama Shuji
计算机断层扫描皮质指数（CTCI）、计算机断层扫描下颌指数（CTMI）和计算机断层扫描指数（下）[CTI（I）]是从锥形束计算机断层扫描图像获得的指数，用于评估种植计划或骨质疏松症的下颌皮质质量。然而，用于测量的横截面图像重建是劳动密集型的。本研究的目的是开发和评估一种方法，自动重建横截面图像和测量皮质宽度在所有领域低于颏孔（MF）。MethodsSeventy-one妇女（平均年龄：52.4岁;范围：20-78岁）参加。他们被分为四个年龄和CTCI组，包括女性年轻（FY）和女性老年人（FO）超过50岁（C1：正常，C2：轻度/中度侵蚀，C3：严重孔隙）。比较CTMI和CTI（I）的自动和手动测量，并使用组内相关系数（ICC）评估观察者间和观察者内的一致性。CTMI或CTI（I）和CTCI之间的关系也assessed.ResultsThe重建和测量的平均处理时间分别为31.9秒和1.22秒。C1和C2/C3组中自动和手动测量值比较的ICC分别为0.932和0.993。FY组、FO-C1组和FO-C3组的CTMI和CTI（I）差异有显著性（p< 0.05）。新方法可以大大减少常规临床工作量。此外，我们的方法能够测量所有下颌骨低于MF的皮质宽度。
ObjectiveThe computed tomography cortical index (CTCI), computed tomography mandibular index (CTMI), and computed tomography index (inferior) [CTI(I)] are indexes obtained from cone-beam computed tomography images for the assessment of the mandibular cortex quality for implant planning or osteoporosis. However, cross-sectional image reconstruction for the measurements is labor-intensive. This study aimed to develop and evaluate a method to automatically reconstruct cross-sectional images and measure the cortex width in all areas inferior to the mental foramen (MF).MethodsSeventy-one women (mean age: 52.4 years; range: 20–78 years) were enrolled. They were divided into four age and CTCI groups, including females younger (FY) and females older (FO) than 50 years (C1: normal, C2: mild/moderate erosion, and C3: severe porosity). Automatic and manual measurements of CTMI and CTI(I) were compared, and the inter- and intraobserver agreements were assessed using the intraclass correlation coefficient (ICC). The relationships between CTMI or CTI(I) and CTCI were also assessed.ResultsThe mean processing times for reconstruction and measurements were 31.9 s and 1.22 s, respectively. ICCs for the comparison of automatic and manual measurements were 0.932 and 0.993 in the C1 and C2/C3 groups, respectively. Significant differences in CTMI and CTI(I) were observed between the FY or the FO-C1 and FO-C3 groups (p< 0.05).ConclusionThe automatic and manual measurements showed a strong agreement. The new method could drastically reduce routine clinical workload. Additionally, our method enables the measurement of the cortex width in all the mandibular bones inferior to the MF.