Premium
A proposed scheme for comprehensive characterization of the measured geometric distortion in magnetic resonance imaging using a three‐dimensional phantom
Author(s) -
Wang Deming,
Doddrell David M.
Publication year - 2004
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.1767051
Subject(s) - imaging phantom , distortion (music) , characterization (materials science) , mathematics , scheme (mathematics) , computer science , algorithm , computer vision , artificial intelligence , physics , mathematical analysis , optics , amplifier , computer network , bandwidth (computing)
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.