Anders E
Technische Universität Berlin, Deutschland.
Biomed Tech (Berl). 2002;47 Suppl 1 Pt 2:750-3.
A theoretical mathematical model of dual-component paramagnetic and diamagnetic material to cancel metal-induced magnetic resonance imaging (MRI) artifacts was investigated and evaluated. The magnetization produced by material causes gradient linearity distortion. By using materials with opposing paramagnetic and diamagnetic properties it is supposed to compensate these effects. Therefore the interferences by paramagnetic and diamagnetic materials on images in a closed 1.5 Tesla high field magnetic resonance imaging system was experimentally examined for different types of sequences and correlated to their magnetic susceptibility. Basing on this results the concept of dual-component materials to solve the problems of MRI--artifacts was theoretically checked by using the finite element method and experimentally in the MRI.
研究并评估了一种用于消除金属诱导磁共振成像（MRI）伪影的双组分顺磁性和抗磁性材料的理论数学模型。材料产生的磁化会导致梯度线性失真。通过使用具有相反顺磁性和抗磁性的材料，有望补偿这些影响。因此，针对不同类型的序列，在封闭的1.5特斯拉高场磁共振成像系统中，通过实验研究了顺磁性和抗磁性材料对图像的干扰，并将其与它们的磁化率相关联。基于这些结果，使用有限元方法从理论上检验了双组分材料解决MRI伪影问题的概念，并在MRI中进行了实验验证。
