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CT与基于MRI的合成CT:使用3D打印指南的胸部和腰部脚螺丝放置的准确性
Jules Cool1,2, Peter P G Lafranca3, Joëll Magré3,4
1Department of Orthopaedic Surgery and Sports Medicine, Amsterdam University Medical Centers, Amsterdam, Netherlands. j.cool@amsterdamumc.nl.
概括
合成CT (sCT) 为传统CT提供了一种无辐射的替代方案,用于创建用于踏板螺丝放置的3D打印指南. 这项研究发现,基于sCT的指南与基于CT的指南在尸体样本中一样准确.
科学领域:
- 脊柱外科手术 脊柱外科手术
- 医疗成像医学成像
- 生物医学工程 生物医学工程
背景情况:
- 3D打印的特定患者指南可以提高儿科脊柱形的脚螺丝精度.
- 规划的传统CT涉及辐射暴露.
- 来自MRI的合成CT (sCT) 为骨形态可视化提供了一个无辐射的替代方案.
研究的目的:
- 通过使用基于传统CT与sCT的3D打印指南,比较胸部和腰部脚螺丝放置的准确性.
- 为了评估sCT作为无辐射源用于脚螺杆导航.
主要方法:
- 使用了四具尸体的全脊椎MRI和CT扫描.
- 人工智能生成的sCTs被创建用于数字脚踏螺丝设计和3D打印指南制造.
- 通过分析K-wire轨迹和分级皮质突破 (Gertzbein-Robbins分类) 来评估准确性.
主要成果:
- 对于sCT和CT指南,中位翻译偏差 (入口点) 的垂直偏差为1.0mm,水平偏差为0.5mm.
- 在sCT (轴向:1.0°,斜视:1.8°) 和CT (轴向:0.9°,斜视:2.1°) 之间,角偏差是可比的.
- 在sCT和CT之间没有发现显著差异,在两组中都没有严重的皮质损伤.
结论:
- sCT提供了与传统CT可比的准确性,用于创建用于踏板螺丝放置的3D打印指南.
- 在胸部和腰部脊柱手术中,sCT是用于脚螺杆导航的可行的无辐射选择.
- 这项研究验证了sCT在尸体模型中的翻译/角度精度和皮质突破率方面的实用性.
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