基于计算机断层扫描的冠状动脉分数计算在降低的管电压下使用代重建和值修改技术:可行性研究
Shirin Habibi1, Mohammad Akbarnejad2, Nahid Rezaeian2
1Department of Radiology, School of Medicine, Iran University of Medical Sciences, Tehran 1449614535, Iran.
Diagnostics (Basel, Switzerland)
|November 14, 2023
概括
使用代重建或修改值的低剂量计算机断层扫描 (CT) 准确计算冠状动脉分数 (CACS),显著减少患者的辐射暴露.
科学领域:
- 放射学 放射学是一门学科.
- 心血管成像 - 心血管成像
- 医学物理 医学物理
背景情况:
- 冠状动脉评分 (CACS) 对心血管健康评估至关重要.
- 来自计算机断层扫描 (CT) 的电离辐射对CACS.是一种担忧.
- 低剂量CT技术正在探索以减轻辐射风险.
研究的目的:
- 评估CACS.的代重建 (IR) 和值修改的准确性.
- 为了评估CACS使用低管电压 (80kVp) 冠状动脉CT血管学.
- 为了比较低剂量CT CACS准确度与标准协议.
主要方法:
- 107名患者接受了双电压 (120kVp和80kVp) 电心电图门CT扫描.
- 在80kVp时使用标准过后投影 (FBP) 和代重建 (IR) 计算CACS.
- 霍恩斯菲尔德单位 (HU) 值 (130,150,170,190) 应用于FBP重建的80kVp图像.
- 在CACS比较中使用了类内相关系数 (ICC).
主要成果:
- 一个80kVp的协议减少了有效剂量64%相比120kVp.
- 高级IR (强度5) 80kVp显示出与标准CACS的良好一致性 (ICC>0.9),得分≥11.
- 在FBP重建的80kVp图像中,修改HU值为190显示了得分≥11的优异一致 (ICC>0.9),得分为零的良好一致 (ICC=0.84).
结论:
- 代重建和密度值修改允许使用低压CT进行准确的CACS计算.
- 这些技术提供了一种有希望的方法,可以在CACS评估期间减少患者的辐射暴露.
- 低剂量CT协议可以保持冠状动脉图像的诊断准确性.
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