Fourier transform magnetic resonance current density imaging (FT-MRCDI) from one component of magnetic flux density.
Fourier transform magnetic resonance current density imaging (FT-MRCDI) from one component of magnetic flux density.
复制标题
来自磁通密度的一个分量的傅里叶变换磁共振电流密度成像 (FT-MRCDI)。
DOI：
10.1088/0031-9155/55/11/013
复制
发表时间：
2010
影响因子：
3.5
通讯作者：
Muftuler,LTugan
中科院分区：
文献类型：
--
作者：
Ider,YusufZiya;Birgul,Ozlem;Oran,OmerFaruk;Arikan,Orhan;Hamamura,MarkJ;Muftuler,LTugan
基于傅里叶变换（FT）的磁通密度单分量磁共振电流密度成像（MRCDI）算法已被开发用于二维和三维问题。对于二维问题，电流被限制在x平面上，并且在物体内部的x平面上也测量磁通密度的z分量，提出了一种迭代FT-MRCDI算法，该算法重构了物体内部的电流分布和物体外部x平面上的磁通密度的z分量。该方法不仅适用于模拟数据，也适用于实际数据。研究了测量误差对电流密度重构空间分辨率的影响。对于3D物体，开发了一种迭代的基于ft的算法，即在任何切片上重建投影电流，使用该切片测量的磁通密度的z分量的拉普拉斯函数作为数据。在注入电流的MRCDI场景中，电流在对象的边界上不是发散自由的。本研究开发的方法也处理了这种情况。
Fourier transform (FT)-based algorithms for magnetic resonance current density imaging (MRCDI) from one component of magnetic flux density have been developed for 2D and 3D problems. For 2D problems, where current is confined to the xy-plane and z-component of the magnetic flux density is measured also on the xy-plane inside the object, an iterative FT-MRCDI algorithm is developed by which both the current distribution inside the object and the z-component of the magnetic flux density on the xy-plane outside the object are reconstructed. The method is applied to simulated as well as actual data from phantoms. The effect of measurement error on the spatial resolution of the current density reconstruction is also investigated. For 3D objects an iterative FT-based algorithm is developed whereby the projected current is reconstructed on any slice using as data the Laplacian of the z-component of magnetic flux density measured for that slice. In an injected current MRCDI scenario, the current is not divergence free on the boundary of the object. The method developed in this study also handles this situation.