磁力共振成像器件和植入物附近的脂肪抑制:一个多材料的比较评估在0.31,0.55,1.5和3特斯拉
L Buchmann1, H Yusuff2, G Bierry3
1Pôle d'imagerie médicale, Service d'imagerie 2, Hôpitaux Universitaires de Strasbourg, Strasbourg, France.
概括
低场MRI显著减少金属工件,改善植入物患者的诊断准确度. 这种方法为传统方法提供了可行的替代方案,可以提高成像质量,而不会影响扫描时间.
科学领域:
- 医疗成像医学成像
- 生物材料科学 生物材料科学
- 放射学 放射学是一门学科.
背景情况:
- 金属植入物通常会导致MRI人工物,阻碍准确的诊断.
- 传统的文物减少技术 (例如,VAT,SEMAC) 会增加扫描时间并导致模糊.
- 低场MRI正在成为一种有希望的替代物减轻工件的替代方案.
研究的目的:
- 评估低场MRI在减少金属文物方面的有效性.
- 为了比较不同场强度和序列的文物减少和图像质量.
- 评估金属植入物患者低场MRI的临床可行性.
主要方法:
- 采用各种金属植入物的定制幻影被扫描在0.31T,0.55T,1.5T和3T.
- 采用了标准的MRI序列 (T1-FSE,T2-FSE,STIR) 带有和没有人工物减少技术.
- 六个盲目的读者对文物进行了定性评估,而定量分析则测量了文物面积.
主要成果:
- 与3TMRI相比,低场MRI (0.31T,0.55T) 显示出文物大小减少了63-80%.
- 有效的脂肪抑制始终在低油田实现.
- 虽然文物减少技术改善了高场成像,但它们增加了模糊和扫描时间.
结论:
- 低场MRI显著减少金属诱导的文物,保持可接受的扫描时间和脂肪抑制.
- 集成低场MRI系统可以补充现有的1.5T和3T扫描仪,以改善患者成像.
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