在大面束计算机断层扫描中,侦察投影的有效剂量
Matheus Barros-Costa1, Jack Britten2, Colin Jones2
1Department of Oral Diagnosis, Piracicaba Dental School, State University of Campinas, Piracicaba, SP, Brazil.
Clinical oral investigations
|October 5, 2024
概括
形束计算断层扫描 (CBCT) 探险扫描可提供低剂量的辐射,有效剂量在0.7至6.9μSv之间. 这些初步图像对于定位是有价值的,并且对患者总辐射暴露的增加极小.
科学领域:
- 放射学 放射学是一门学科.
- 医学物理 医学物理
- 牙科成像 牙科成像 牙科成像
背景情况:
- 圆束计算断层扫描 (CBCT) 广泛用于牙科和面成像.
- 侦察投影通常是为了确保患者在视野内的正确定位而获得的.
- 从这些侦察预测中评估辐射剂量对于患者安全至关重要.
研究的目的:
- 在四个不同的CBCT单元上评估与各种侦察投射协议相关的有效和器官/组织等效辐射剂量.
- 为了比较不同侦察成像参数的辐射负荷.
主要方法:
- 光学刺激发光剂量计 (OSLD) 用于测量人类形象的头幽灵体内的辐射剂量.
- 在四个CBCT设备 (Midmark EIOS,3D Accuitomo F170,Veraviewepocs 3D R100,Veraview X800) 上测试了12种不同的侦察投影协议.
- 对于每个测试方案,有效剂量和器官/组织等效剂量都被计算出来.
主要成果:
- 在评估的CBCT侦察协议中,有效剂量从0.7μSv到6.9μSv不等.
- 甲状腺对有效剂量贡献最大,其次是唾液腺.
- 口腔粘膜和唾液腺显示最高的器官/组织等效剂量.
结论:
- 在CBCT中,侦察投影采集是一种低剂量程序,尽管机器和协议之间存在很小的差异.
- 侦察图像对患者整体辐射剂量的贡献是最小的.
- 强烈建议使用侦察投影来准确地定位感兴趣的区域,提高诊断效率,而无需显著的辐射风险.
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