在不同扫描仪上对多重扩散权重核磁共振技术的效率和准确性评估
Frederik Crop1,2, Clémence Robert1, Romain Viard3,4
1Department of Medical Physics, Centre Oscar Lambret, Lille, France.
Journal of magnetic resonance imaging : JMRI
|June 19, 2023
概括
选择扩散权重成像 (DWI) 技术需要平衡效率和准确性. 像ZoomitPro和TSE-SPLICE这样的新方法提供了改进,但在视野或效率方面存在权衡,影响了体内明显扩散系数 (ADC) 的准确性.
科学领域:
- 放射学和医学成像学 医学成像学
- 生物医学工程 生物医学工程
- 量化MRI是指数量化的MRI.
背景情况:
- 选择最佳的扩散加权成像 (DWI) 技术是具有挑战性的,因为临床效率和明显扩散系数 (ADC) 准确性之间存在固有的权衡.
- 不同的DWI技术,线圈和扫描仪具有独特的性能特征,影响图像质量和定量测量.
研究的目的:
- 在各种DWI获取技术中量化评估信号噪声比 (SNR) 效率,ADC准确性,工件和扭曲.
- 为了比较减少扭曲和小视野 (FOV) DWI序列与标准回声平面成像 (EPI) 的性能.
主要方法:
- 在1.5T和3T扫描仪上评估了DWI技术,包括EPI,RESOLVE,Turbo Spin Echo (TSE) -SPLICE,ZoomitPro和IRIS. 在1.5T和3T扫描仪上进行评估.
- 使用NIST扩散幻影量化SNR效率,几何扭曲和易感工件.
- 在51名患者 (前列腺癌和头癌) 中,使用QIBA方法评估了幻体和体内ADC的准确性和一致性.
- 在体内图像质量方面,获得了独立专家的评级.
主要成果:
- 与EPI相比,ZoomitPro的小FOV序列提高了b图像效率8%-14%并减少了工件,尽管FOV较小.
- 对于b值≤500秒/mm2.2,TSE-SPLICE显著降低了人工制品的效率成本,效率成本为24%.
- 幻ADC的准确性显示出高的真实性 (95%的LOA在±0.03 × 10−3 mm2/秒内),但在体内ADC技术之间的一致性表现出相当大的偏差和可变性 (95%的LOA±0.3 × 10−3 mm2/秒).
结论:
- 像ZoomitPro和TSE-SPLICE这样的减少扭曲的技术在减少工件方面提供了好处,但涉及到与成像效率或FOV的权衡.
- 基于幻影的ADC质量控制指标可能不能完全代表体内准确性,因为在临床实践中不同DWI技术之间存在显著的偏差和变化.
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