优化高度 (400 mgI/mL) 对比介质体积用于腹部计算机断层扫描:基于固定的剂量和总体体重的协议之间的比较
Wangjia Li1, Ling Bai1, Wei Ren2
1Department of Radiology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China.
Quantitative imaging in medicine and surgery
|March 12, 2026
概括
在腹部CT扫描中的基于总体体重的对比介质剂量协议使用较少的对比体积. 特定的TBW协议 (450 mgI/kg在100 kVp或500 mgI/kg在120 kVp) 分别提供最佳的血管和体增强.
科学领域:
- 放射学 放射学是一门学科.
- 医疗成像医学成像
- 诊断成像 诊断成像 诊断成像
背景情况:
- 对比增强型计算机断层扫描 (CT) 对于诊断腹部疾病至关重要.
- 优化对比介质 (CM) 剂量对于患者的安全和图像质量至关重要.
- 这项研究比较了固定的剂量与总体体重 (TBW) 基的CM协议在腹部多相CT.
研究的目的:
- 评估不同CM剂量协议的血管和辅酶体增强效应.
- 为了比较固定剂量和基于TBW的CM协议之间的整体图像质量.
- 为特定的腹部CT应用确定基于TBW的最佳协议.
主要方法:
- 对接受腹部多相CT的患者的回顾性分析.
- 固定剂量组 (80毫升CM在120kVp) 和基于TBW的组 (400-500 mgI/kg在100或120kVp) 之间的比较.
- 测量CT衰减值,对比度增强指数 (CEI),信号与噪声比率 (SNR) 和对比与噪声比率 (CNR).
主要成果:
- 基于TBW的组获得的CM体积明显低于固定剂量组.
- 在不同腹部结构的群体之间观察到CEI,SNR和CNR的显著差异.
- 在特定的TBW协议 (450 mgI/kg在100 kVp,500 mgI/kg在120 kVp) 和固定剂量组之间,没有发现主观图像质量的显著差异.
结论:
- 基于TBW的对比介质剂量在腹部多相CT中有效.
- 在100 kVp的TBW协议下,建议使用450 mgI/kg进行最佳的血管评估.
- 在120 kVp的500 mgI/kg的TBW协议被推用于更高水平的辅酶体和瘤可视化.
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