DocumentCode
899655
Title
Computation of Transmitted and Received 
Fields in Magnetic Resonance Imaging
Author
Milles, J. ; Yue Min Zhu ; Nan-Kuei Chen ; Panych, L.P. ; Gimenez, G. ; Guttmann, C.R.G.
Author_Institution
INSA, Villeurbanne
Volume
53
Issue
5
fYear
2006
fDate
5/1/2006 12:00:00 AM
Firstpage
885
Lastpage
895
Abstract
Computation of B1 fields is a key issue for determination and correction of intensity nonuniformity in magnetic resonance images. This paper presents a new method for computing transmitted and received B1 fields. Our method combines a modified MRI acquisition protocol and an estimation technique based on the Levenberg-Marquardt algorithm and spatial filtering. It enables accurate estimation of transmitted and received B1 fields for both homogeneous and heterogeneous objects. The method is validated using numerical simulations and experimental data from phantom and human scans. The experimental results are in agreement with theoretical expectations
Keywords
biomedical MRI; medical image processing; phantoms; spatial filters; Levenberg-Marquardt algorithm; human scans; magnetic resonance imaging; phantom; received B1 fields; spatial filtering; transmitted B1 fields; Biomedical imaging; Coils; Filtering; Finite difference methods; Hospitals; Magnetic resonance imaging; Magnetic separation; Milling machines; Radiology; Time domain analysis; Intensity nonuniformity; magnetic resonance imaging; nonlinear inversion; spatial filtering; transmitted and received; Algorithms; Artifacts; Brain; Electromagnetic Fields; Humans; Image Enhancement; Image Interpretation, Computer-Assisted; Imaging, Three-Dimensional; Magnetic Resonance Imaging; Reproducibility of Results; Sensitivity and Specificity;
fLanguage
English
Journal_Title
Biomedical Engineering, IEEE Transactions on
Publisher
ieee
ISSN
0018-9294
Type
jour
DOI
10.1109/TBME.2005.863955
Filename
1621140
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