Assessment of bone segmentation quality of cone-beam CT versus multislice spiral CT: a pilot study
Assessment of bone segmentation quality of cone-beam CT versus multislice spiral CT: a pilot study
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DOI：
10.1016/j.tripleo.2005.10.039
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发表时间：
2006-08-01
影响因子：
--
通讯作者：
Suetens, Paul
中科院分区：
文献类型：
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作者：
Loubele, Miet;Maes, Frederik;Suetens, Paul
目标.本研究的目的是通过与多层螺旋计算机断层扫描（MSCT）获得的类似模型进行比较，定量评估锥束计算机断层扫描（CBCT）生成的颌骨模型的质量。进行了三项病例研究，涉及使用3台CBCT（NewTom 9000 DVT、Accuitomo 3D和i-CAT）和2台MSCT扫描仪（Somatom VolumeZoom和Lightspeed）采集的拟人头部模型和真实的患者图像。使用全局阈值从CBCT和MSCT图像中分割骨。通过比较CBCT与MSCT图像配准自动识别的解剖学对应部位的骨厚度测量值，评估CBCT与MSCT分割差异。MSCT和CBCT节段骨厚度之间存在统计学显著差异，范围为0.05 +/- 0.47 mm（i-CAT）至1.2 +/- 1.00 mm（3D Accuitomo，后上颌骨）。已经开发了一种自动化、可重复且不依赖于计算机的方法，以评估CBCT骨模型的质量，使用MSCT作为临床确立的参考方法。我们的验证方法通常适用于没有几何地面实况的情况。
Objectives. The objective of this study was to quantitatively assess the quality of jawbone models generated from cone beam computed tomography (CBCT) by comparison with similar models obtained from multislice spiral computed tomography (MSCT).Material and Methods. Three case studies were performed involving images of anthropomorphic head phantoms and real patients acquired with 3 CBCT (NewTom 9000 DVT, Accuitomo 3D, and i-CAT) and 2 MSCT scanners (Somatom VolumeZoom and Lightspeed). Bone was segmented from the CBCT and MSCT images using global thresholding. CBCT vs MSCT segmentation differences were assessed by comparing bone thickness measurements at anatomically corresponding sites, identified automatically by CBCT to MSCT image registration.Results. There was a statistically significant difference between the MSCT and CBCT segmented bone thicknesses, varying from 0.05 +/- 0.47 mm i-CAT) up to 1.2 +/- 1.00 mm (3D Accuitomo, posterior maxilla).Conclusions. An automated, reproducible, and observer-independent method has been developed to assess the quality of CBCT bone models using MSCT as a clinically established method of reference. Our validation method is generally applicable in cases where no geometric ground-truth is available.