在肺部Q-SPECT/CT成像中对CT衍生辐射剂量计算的研究
1Samsun Gazi State Hospital, Clinic of Nuclear Medicine, Samsun, Türkiye.
Molecular imaging and radionuclide therapy
|October 23, 2023
概括
计算机断层扫描 (CT) 肺 perfusion 扫描中的有效剂量 (ED) 在肺栓塞 (PE) 患者中较高. 优化CT剂量减少协议,特别是使用PE (+) 病例的100kVp,显著降低了辐射暴露.
科学领域:
- 放射学和成像学 放射学和成像学
- 医学物理 医学物理
- 核医学是一种核医学.
背景情况:
- 肺 perfusion-single-photon发射计算机断层扫描 (Q-SPECT) /CT 结合了功能和解剖成像.
- 计算机断层扫描 (CT) 组件有助于整体有效剂量 (ED).
- 优化CT剂量减少策略对于Q-SPECT/CT手术中的患者安全至关重要.
研究的目的:
- 从Q-SPECT/CT.的CT组件中量化有效剂量 (ED).
- 为了比较患有肺栓塞 (PE) 和没有肺栓塞 (PE) 的患者之间的ED.
- 评估CT剂量减小 (CTDR) 协议对ED的影响.
主要方法:
- 对327例Q-SPECT/CT患者病例 (2016-2022) 的回顾性分析.
- 记录的CT参数包括管电压,剂量长度产物 (DLP) 和计算ED.
- 使用曼·惠特尼U测试对ED的统计比较,按PE状态和CTDR协议分层.
主要成果:
- 与PE (-) 病例 (1.20 ± 0.70 mSv) 相比,PE (+) 病例中的ED显著更高 (1.54 ± 1.04 mSv),增加了28%.
- 与CTDR (1.55 ± 0.47 mSv) 相比,非CTDR协议导致PE (-) 病例的ED显著降低 (0.87 ± 0.72 mSv).
- 特定的管电压协议显示ED显著减少:在使用较低的管电压时,PE (+) 减少了42%,PE (-) 减少了41% (100kVp暗示).
结论:
- 非CTDR协议有效地减少PE (-) 病例中的ED.
- 建议在PE (+) 病例中使用100kVp的管电压,以尽量减少辐射剂量.
- 定制的CT参数可以优化Q-SPECT/CT成像中的辐射安全.
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