Document Detail


Targeted radiofrequency field mapping using 3D reduced field-of-view-catalyzed double-angle method.
MedLine Citation:
PMID:  21705167     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
PURPOSE: The aim of this study was to develop a targeted volumetric radiofrequency field (B(1)(+)) mapping technique to provide region-of-interest B(1)(+) information.
MATERIALS AND METHODS: Targeted B(1)(+) maps were acquired using three-dimensional (3D) reduced field-of-view (FOV) inner-volume turbo spin echo-catalyzed double-angle method (DAM). Targeted B(1)(+) maps were compared with full-FOV B(1)(+) maps acquired using 3D catalyzed DAM in a phantom and in the brain of a healthy volunteer. In addition, targeted volumetric abdomeninal B(1)(+) mapping was demonstrated in the abdomen of another healthy volunteer.
RESULTS: The targeted reduced-FOV images demonstrated no aliasing artifacts in all experiments. Close match between targeted B(1)(+) map and reference full-FOV B(1)(+) map in the same region was observed, with percentage root-mean-squared error <0.4% in the phantom and <0.8% in the healthy volunteer brain. The abdominal B(1)(+) maps showed small B(1)(+) variation in the kidneys and liver from the healthy volunteer.
CONCLUSION: The proposed 3D reduced-FOV catalyzed DAM provides a rapid, simple and accurate method for targeted volumetric B(1)(+) mapping and can be easily implemented for applications related to radiofrequency field mapping in small targeted regions.
Authors:
Dingxin Wang; Sven Zuehlsdorff; Reed A Omary; Andrew C Larson
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural     Date:  2011-06-25
Journal Detail:
Title:  Magnetic resonance imaging     Volume:  29     ISSN:  1873-5894     ISO Abbreviation:  Magn Reson Imaging     Publication Date:  2011 Oct 
Date Detail:
Created Date:  2011-09-13     Completed Date:  2012-01-05     Revised Date:  2014-09-13    
Medline Journal Info:
Nlm Unique ID:  8214883     Medline TA:  Magn Reson Imaging     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  1131-7     Citation Subset:  IM    
Copyright Information:
Copyright © 2011 Elsevier Inc. All rights reserved.
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MeSH Terms
Descriptor/Qualifier:
Artifacts
Brain / pathology*
Brain Mapping / methods
Humans
Imaging, Three-Dimensional / methods*
Kidney / pathology
Liver / pathology
Magnetic Resonance Imaging / methods
Models, Anatomic
Phantoms, Imaging
Radio Waves
Reproducibility of Results
Grant Support
ID/Acronym/Agency:
P41 RR008079/RR/NCRR NIH HHS; P41 RR008079/RR/NCRR NIH HHS; R01 CA126809/CA/NCI NIH HHS; R01 CA126809/CA/NCI NIH HHS; R01 CA134719/CA/NCI NIH HHS; R01 CA134719/CA/NCI NIH HHS; R01 CA134719-01/CA/NCI NIH HHS
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