结合虚拟单能成像和代金属工件减少,实现了第一代光子计数计算机断层扫描,用于牙科植入物患者
Theresa Sophie Patzer1, Andreas Steven Kunz2, Henner Huflage2
1Department of Diagnostic and Interventional Radiology, University Hospital Würzburg, Oberdürrbacherstraße 6, 97080, Würzburg, Germany. Patzer_T@ukw.de.
代金属工件减少 (iMAR) 在光子计数检测器CT (PCD-CT) 中显著减少了牙植入物工件. 将iMAR与高keV水平的虚拟单能成像 (VMI) 结合起来,进一步提高了文物减少和图像质量.
科学领域:
- 医疗成像医学成像
- 放射学 放射学是一门学科.
- 光子计数探测器技术的技术
背景情况:
- 虚拟单能成像 (VMI) 和代金属工件减少 (iMAR) 的已建立的能量整合探测器CT方法缺乏对光子计数探测器CT (PCD-CT) 的彻底研究.
- 牙植入物是面CT成像中常见的文物来源,影响诊断准确度.
研究的目的:
- 评估VMI,iMAR及其组合在减少牙科植入患者PCD-CT中金属工件的有效性.
- 评估对图像质量的影响,包括文物范围,软组织可解释性和噪声水平.
主要方法:
- 50名牙科植入物患者使用多色120kVp成像 (T3D) 进行PCD-CT.
- 图像用VMI (40-190 keV),T3DiMAR和VMIiMAR进行了重建.
- 通过减弱和噪声测量量,以及由三名读者主观评估来量化人工物.
主要成果:
- 与非iMAR数据集相比,iMAR显著降低了超/低腰骨,软组织损伤和图像噪声 (p ≤ 0.001).
- 在≥110keV的VMIiMAR显示出比T3DiMAR (p ≤0.023) 更优异的主观人工物减少和较少的过度校正 (p ≤0.001).
- 仅VMI就显示了最小的工件减少和没有显著的消毒,但更高的keV VMI减少了软组织损伤 (p ≤ 0.009).
结论:
- 在PCD-CT.中,iMAR后处理大大减少了牙植入物工件.
- 单独的VMI具有有限的工件减少潜力,但将VMI (≥110 keV) 与iMAR结合起来可以获得最显著的工件减少.
- iMAR和VMI的组合是改善牙植入体患者的面PCD-CT图像质量的有效工具.
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