Existence of metal in magnetic resonance imaging (MRI) is very troublesome. In recent years, Iterative decomposition of water and fat with echo asymmetry and least-squares estimation (IDEAL) using 3-points Dixon technique become used as the useful method for uniform fat suppression at the magnetic field inhomogeneity. However, misregistration artifact appeared under some conditions. Purpose of this study is searching for conditions of misregistration artifact on IDEAL method.
We have created the phantom which had contained oil, water and the titanium. The relation of misregistration artifact and seed-point of region growing technique was analyzed by shifting the position of metal, changing the position of FOV. Misregistration artifact on IDEAL method was sometimes occurred to existence the metal at center of phantom under the each conditions.
雑誌名
熊本大学医学部保健学科紀要
巻
8
ページ
23 - 30
発行年
2012-03-03
ISSN
18807151
書誌レコードID
AA12010572
フォーマット
application/pdf
形態
792970 bytes
著者版フラグ
author
日本十進分類法
492.1
その他の言語のタイトル
Examination of Misregistration Artifact on Iterative Decomposition of Water and Fat with Echo Asymmetry and Least-Squares Estimation (IDEAL) Method