在非增强型计算机断层扫描中,软组织和半值窗口在尿道石块大小测量中的性能优于骨窗口
Klara Sahlén1, Anders Magnusson1, Ulf Nyman2
1Department of Surgical Sciences, Radiology, Uppsala University, Uppsala, Sweden.
Acta radiologica (Stockholm, Sweden : 1987)
|December 23, 2025
概括
窗户设置显著影响尿道石块大小测量,影响自发石块通道的预测. 半值MAX窗口为临床使用提供了最可重现的测量.
科学领域:
- 放射学 放射学是一门学科.
- 泌尿器科 泌尿器科 泌尿器科 泌尿器科
- 医疗成像医学成像
背景情况:
- 尿道石块大小测量的Interreader变异性影响了自发石块通道 (SSP) 的预测.
- 计算机断层扫描 (CT) 窗口设置会影响测量变化,特别是在近端尿路结石.
研究的目的:
- 在四个不同的CT窗口设置中评估尿道石块大小测量的读者间变异性.
- 为了确定可重复性尿路结石大小评估的最佳窗口设置.
主要方法:
- 在紧急CT时,对124名患有近端尿路结石 (≥2.0毫米) 的患者进行了回顾性分析.
- 五名观察员用软组织,骨头和两个半值 (MEAN,MAX) 窗口在三维中测量了石头的大小.
- 评估了平均 (LOAM) 石块大小和SSP预测后勤回归的协议极限.
主要成果:
- 骨窗显示了最高的互读器变化 (LOAM ±1.6 mm).
- 软组织,半值MEAN和半值MAX窗口的变化逐渐降低 (分别为±0.4毫米,±0.3毫米,±0.2毫米).
- 半值MAX窗口显示了最小的interreader变化,这对于可重复测量至关重要.
结论:
- 骨窗设置不适合精确测量尿道石块大小.
- 软组织和半值窗口提供亚毫米互读器可变性,最大限度地减少临床影响.
- 半值MAX窗口被推用于可复制和半自动尿道石块大小测量.
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