形光束CT凸三角视野是否会影响高密度材料的图像形状扭曲?
Deivi Cascante-Sequeira1, Fernanda Coelho-Silva1,2, Lucas P Lopes Rosado1,3
1Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, University of Campinas, Piracicaba, Brazil.
Dento maxillo facial radiology
|July 10, 2023
概括
凸的三角视野 (FOV) 在两种CBCT设备的高密度材料中引起了轴扭曲. 在所有FOV中都出现了垂直放大,在X800设备的圆柱形FOV中观察到的放大率更高.
科学领域:
- 牙科放射学 牙科放射学
- 医学成像技术 医学成像技术
背景情况:
- 圆束计算断层扫描 (CBCT) 对于牙科成像非常重要.
- 准确评估高密度材料对于诊断解释至关重要.
- 了解CBCT设备视野 (FOV) 特性对于最小化图像扭曲至关重要.
研究的目的:
- 用两个CBCT设备成像时评估高密度材料的尺寸精度和形状扭曲.
- 为了比较凸三角形和圆柱形视野 (FOV) 对图像保真度的影响.
主要方法:
- 四个高密度被扫描使用两个CBCT设备 (Veraviewepocs R100和X800) 与不同的FOVs.
- 口腔放射学家分析了CBCT扫描,以检测口腔放射学家的水平和垂直维度变化.
- 九名口腔放射科医生对轴形状扭曲进行了主观评估.
主要成果:
- 凸三角FOV导致CBCT设备的轴平面扭曲显著增加.
- 在R100设备的两个FOV中发现了主观形状扭曲,但在X800设备中没有.
- 在所有材料和FOV中观察到垂直放大,特别是X800设备的圆柱形FOV的放大值更高.
结论:
- 凸三角FOV显著影响CBCT成像中的高密度材料的轴扭曲.
- 垂直放大是一个一致的发现,在X800设备的圆柱形FOV中更加明显.
- 放射科医生在解释密集材料的CBCT扫描时应注意FOV特异性扭曲.
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