低剂量圆束CT用于内镜外套胃形成术中的胃体积
Ilaria Nacci1,2, Roberto Moretti3, Andrea Morasca4,5
1Dipartimento di Diagnostica per Immagini e Radioterapia Oncologica, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy. ilaria.nacci@guest.policlinicogemelli.it.
European radiology experimental
|October 7, 2025
概括
圆束计算断层扫描 (CBCT) 为内镜袖胃形成术 (ESG) 患者提供可行的胃体积评估. 这种低剂量成像技术为规划和评估ESG结果提供了足够的质量,与传统CT相比,辐射暴露减少.
科学领域:
- 医疗成像医学成像
- 腹部外科 腹部外科
- 放射学 放射学是一门学科.
背景情况:
- 内镜套胃形成术 (ESG) 是一种新兴的减肥手术,需要准确的胃体积评估来规划和评估结果.
- 传统的计算机断层扫描 (CT) 提供了详细的成像,但涉及大量的辐射暴露.
- 圆束计算断层扫描 (CBCT) 提供了较低辐射的替代方案,但其在ESG患者的胃体积测量中的实用性尚未得到充分证实.
研究的目的:
- 评估使用形束计算断层扫描 (CBCT) 进行胃体积评估在内镜套胃形成术 (ESG) 之前和之后的可行性.
- 为了确定与ESG患者的CBCT成像相关的辐射剂量.
- 为了比较CBCT扫描使用CO2 insufflation与Gastrografin之间的图像质量和辐射剂量.
主要方法:
- 预计将10名接受ESG治疗的患者纳入研究.
- 在麻醉下进行了三次CBCT扫描:ESG前 (CO2),ESG后 (CO2) 和ESG后 (胃图).
- 图像质量被评估为3D重建和体积计算;有效剂量 (ED) 估计使用蒙特卡洛模拟.
主要成果:
- CBCT为3D重建和胃体积测量提供了足够的图像质量,尽管与传统CT不匹配.
- 平均有效剂量为4.2mSv (ESG CO2前),4.2mSv (ESG CO2后) 和4.8mSv (ESG 后胃镜).
- CBCT ED比传统CT低约50%,CO2灌气产生较低的剂量和比Gastrografin更好的图像质量.
结论:
- 低剂量CBCT是ESG患者胃体积测量的可行工具,提供令人满意的图像质量.
- 与传统CT相比,CBCT显著减少了约50%的辐射暴露.
- 这种技术促进了手术内成像,有可能改善ESG规划和术后结果评估.
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