A proposed scheme for comprehensive characterization of the measured geometric distortion in magnetic resonance imaging using a three-dimensional phantom

被引：20

作者：

Wang, DM ^{[1
]}

Doddrell, DM ^{[1
]}

机构：

[1] Univ Queensland, Ctr Magnet Resonance, Brisbane, Qld 4072, Australia

来源：

MEDICAL PHYSICS | 2004年 / 31卷 / 08期

关键词：

geometric distortion; 3-D phantom; comprehensive assessment; characterization; MRI; quality assurance;

D O I：

10.1118/1.1767051

中图分类号：

R8 [特种医学]; R445 [影像诊断学];

学科分类号：

1002 ; 100207 ; 1009 ;

摘要：

Recently, a 3-dimensional phantom that can provide a comprehensive, accurate and complete measurement of the geometric distortion in MRI has been developed. In this paper, a scheme for characterizing the measured geometric distortion using the 3-D phantom is described. In the proposed scheme, a number of quantitative measures are developed and used to characterize the geometric distortion. These measures encompass the overall and spatial aspects of the geometric distortion. Two specific types of volume of interest, rectangular parallelepipeds (including cubes) and spheres are considered in the proposed scheme. As an illustration, characterization of the geometric distortion in a Siemens 1.5T Sonata MRI system using the proposed scheme is presented. As shown, the proposed scheme provides a comprehensive assessment of the geometric distortion. The scheme can be potentially used as a standard procedure for the assessment of geometric distortion in MRI. (C) 2004 American Association of Physicists in Medicine.

引用

页码：2212 / 2218

页数：7

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