CBCT头倾斜对3D状细分的可重现性的影响
Samy El Bachaoui1,2, Pieter-Jan Verhelst1,2, Karla de Faria Vasconcelos2
1Department of Oral and Maxillofacial Surgery, University Hospitals Leuven, Kapucijnenvoer, Belgium.
Dento maxillo facial radiology
|August 22, 2023
概括
头部定位的变化可能会影响形光束CT (CBCT) 3D模型对下骨的可重现性. 然而,这些变化不太可能对临床诊断或患者管理产生重大影响.
科学领域:
- 牙科 牙科是指牙科的专业.
- 放射学 放射学是一门学科.
- 生物医学工程 生物医学工程
背景情况:
- 圆束CT (CBCT) 对于牙科成像至关重要.
- 下的3D细分模型的可复制性对于准确的诊断至关重要.
- 头部位置的变化可能会影响CBCT扫描的可靠性.
研究的目的:
- 为了评估不同头部位置对CBCT扫描中的3D细分下尾模型的可重现性的影响.
- 量化由于头部定位变化而导致的状模型中的体积和表面差异.
主要方法:
- 五个尸体头被扫描在参考位置和三个倾斜位置 (前部翻译,5度斜率,10度斜率).
- mandibular condyles 的 3D 表面模型被创建.
- 基于Voxel的注册被用来比较模型,分析体积差异和根平均平方 (RMS) 距离.
主要成果:
- 替代位置和参考位置之间的平均体积差异是微小的 (例如,0.1mm3为10°斜率).
- 这些体积差异在之前报告的操作内变异性范围内.
- RMS距离始终低于0.5毫米的临床可接受度值.
结论:
- 倾斜的头部位置可能会轻微影响CBCT中的3D状体细分的可重现性.
- 观察到的差异不太可能对临床患者的诊断和治疗计划产生重大影响.
- 标准化的头部定位协议可以提高CBCT可重现性,用于下冠状腺分析.
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