扩散权重磁共振成像参数对甲状腺结节的诊断准确度的影响:系统性审查和元分析
Caterina Giannitto1,2, Angela Ammirabile1,2, Giorgia Carnicelli1,2
1Department of Diagnostic and Interventional Radiology, IRCCS Humanitas Research Hospital, Milan, Italy.
Journal of magnetic resonance imaging : JMRI
|October 16, 2025
概括
扩散权重核磁共振 (DW-MRI) 可以准确地区分恶性和良性甲状腺结节. 场强度和采集参数等技术因素影响诊断性能,特定设置优化灵敏度和特异性.
科学领域:
- 放射学 放射学是一门学科.
- 在瘤学瘤学.
- 医疗成像医学成像
背景情况:
- 手术是甲状腺结节诊断的标准,但是在不确定的情况下是侵入性的,往往是不必要的.
- 扩散加重MRI (DW-MRI) 提供了一个非侵入性的替代方案,但其诊断准确性和获取参数的影响需要澄清.
研究的目的:
- 评估DW-MRI在区分恶性和良性甲状腺结节的诊断准确性.
- 确定影响甲状腺结节评估中DW-MRI性能的关键获取参数.
主要方法:
- 一项系统性审查和对37项涉及2073名患者和2403个甲状腺结节的研究的元分析.
- 两变随机效应模型估计了聚合的灵敏度,特异性和AUC;元回归探索了参数的影响.
- 通过使用QUADAS-2评估研究的偏差风险和适用性.
主要成果:
- 在DW-MRI中,综合灵敏度为0.84,特异性为0.87,AUC为0.91.
- 较高的场强度 (3.0T) 降低了特异性,而特定的获取参数 (例如,<5个平均值,矩阵≥130,b值>2,b≥1000) 提高了灵敏度和特异性.
- 与良性结节相比,恶性结节的明显扩散系数 (ADC) 值较低.
结论:
- DW-MRI是评估甲状腺结节的宝贵工具,提供良好的诊断准确度.
- 诊断性能受到技术和方法因素的重大影响,需要优化获取参数.
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