磁共振容积数据上的偏置伪影抑制

Bias artifact suppression on MR volumes.

作者信息

Ardizzone E, Pirrone R, Gambino O

机构信息

Universitá degli studi di Palermo, DINFO-Dipartimento di Ingegneria Informatica, viale delle Scienze-Ed. 6-3(o)piano, 90128 Palermo, Italy.

出版信息

Comput Methods Programs Biomed. 2008 Oct;92(1):35-53. doi: 10.1016/j.cmpb.2008.06.005. Epub 2008 Jul 21.

DOI:10.1016/j.cmpb.2008.06.005

PMID:18644657

Abstract

RF-inhomogeneity correction is a relevant research topic in the field of magnetic resonance imaging (MRI). A volume corrupted by this artifact exhibits nonuniform illumination both inside a single slice and between adjacent ones. In this work a bias correction technique is presented, which suppresses this artifact on MR volumes scanned from different body parts without any a priori hypothesis on the artifact model. Theoretical foundations of the method are reported together with experimental results and a comparison is presented with both the 2D version of the algorithm and other techniques that are widely used in MRI literature.

摘要

射频不均匀性校正是磁共振成像（MRI）领域的一个相关研究课题。受此伪影影响的体数据在单个切片内部以及相邻切片之间都表现出不均匀的照明。在这项工作中，提出了一种偏差校正技术，该技术可以在不对伪影模型做任何先验假设的情况下，抑制从不同身体部位扫描的磁共振体数据上的这种伪影。报告了该方法的理论基础以及实验结果，并与该算法的二维版本和MRI文献中广泛使用的其他技术进行了比较。