使用4D流动MRI测量盆腔静脉血管的定量流量
Patrick Ghibes1, Petros Martirosian2, Gerd Grözinger1
1Department for Diagnostic and Interventional Radiology, University Hospital Tuebingen, Hoppe-Seyler-Strasse 3, 72076 Tuebingen, Germany (P.G., G.G., D.P.).
Academic radiology
|September 15, 2023
概括
四维流动 (4D流动) 磁共振成像 (MRI) 准确地测量骨盆静脉血流. 优化的设置可以减少扫描时间而不会影响结果,有助于诊断诸如阴道静脉压缩综合征等疾病.
科学领域:
- 医疗成像医学成像
- 心血管成像 - 心血管成像
- 血管生物学 血管生物学
背景情况:
- 对盆腔静脉系统的定量流量评估对于诊断各种血管疾病至关重要.
- 传统的成像方法在充分描述静脉血液动力学方面可能存在局限性.
- 4D流动MRI提供了一种非侵入性的方法,可以随着时间的推移在三维中可视化和量化血液流动.
研究的目的:
- 为了评估不同4D流动MRI序列在盆腔静脉血管系统的定量流量测量的有效性.
- 为了确定最佳的成像参数,以准确有效地评估静脉流量.
- 在健康志愿者中,将静脉流量参数与动脉流量进行比较.
主要方法:
- 一项涉及健康志愿者的前性研究,使用3特斯拉MRI扫描仪.
- 获取4D流MRI数据,具有不同的同位素分辨率 (1.6^3 mm^3和2.0^3 mm^3) 和速度编码 (Venc) 设置 (50厘米/秒和100厘米/秒).
- 计算从下腔静脉到共静脉的盆腔静脉段的 perfusion 参数,以动脉流作为参考.
主要成果:
- 流量测量成功地从所有研究的4D流量MRI序列中得出.
- 在三个测试序列的静脉流量测量中没有发现显著差异.
- 盆腔静脉血管表现出与其动脉对应物可比的输液参数,表明测量的可靠性.
结论:
- 4D流动MRI是一种适合用于测量盆腔静脉血管系统的定量流量的技术.
- 降低分辨率和增加Venc可以减少扫描时间,而不会影响定量准确性.
- 这种技术有可能在未来用于诊断和监测静脉压缩综合征.
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