圆束计算机断层扫描对年龄估计的影响:一项三维表面积分析研究
Meghna Gohain1, Muhammad Khan Asif2, Phrabhakaran Nambiar1,3
1Department of Oral and Maxillofacial Clinical Sciences, Faculty of Dentistry, Universiti Malaya, Kuala Lumpur, Malaysia.
Journal of forensic sciences
|July 20, 2025
概括
圆束计算断层扫描 (CBCT) 的voxel大小不会显著影响3D年龄估计的准确性. 较大的素尺寸可能会减少辐射暴露,但不会影响儿科牙科成像的结果.
科学领域:
- 牙科放射学 牙科放射学
- 法医人类学 法医人类学
- 儿科牙科 儿科牙科
背景情况:
- 精确的三维 (3D) 年龄估计至关重要,并且依赖于形束计算断层扫描 (CBCT) 图像质量.
- 伏塞尔大小是CBCT图像分辨率的关键决定因素,可能会影响3D年龄估计方法的准确性.
- 调查素大小的影响对于优化成像协议和最大限度地减少辐射暴露,特别是儿童至关重要.
研究的目的:
- 通过3D表面积分析 (3DSAA) 评估不同CBCT声素大小对年龄估计准确性的影响.
- 为了确定较小的声素大小是否可以提高3DSAA的精度,以估计发育中的牙的时间年龄 (CA).
- 评估先前建立的3DSAA年龄估计模型在不同的音量尺寸中的一致性.
主要方法:
- 追溯收集了128个CBCT扫描,从7-14岁的儿童中查看了正在发育的大第二前的情况.
- 应用3DSAA方法来测量顶部的根表面积 (RSAA),使用76微米的声素尺寸.
- 利用从300μm的voxel数据中得出的预先存在的回归公式来计算76μm数据的平均绝对误差 (MAE).
主要成果:
- 在CA和RSAA之间观察到强烈的负相关性 (r=0.960),MAE为0.51,证实了模型的准确性.
- RSAA和根部发育状态是年龄的显著预测因素 (p<0.05),而性别和种族则不是.
- 在76微米和300微米的voxel数据 (p>0.05) 之间的相关性强度,系数或MAE值中没有发现显著差异.
结论:
- 基于3DSAA的年龄估计模型在不同的CBCT声素大小中显示出一致的性能.
- 使用较小的voxel大小 (例如76μm) 并不能显著提高这个年龄估计方法的准确性.
- 在儿科CBCT中,更大的voxel尺寸可能是可取的,以减少辐射剂量而不会影响年龄估计的准确性.
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