| Targeted radiofrequency field mapping using 3D reduced field-of-view-catalyzed double-angle method. | |
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MedLine Citation:
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PMID: 21705167 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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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. |
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Authors:
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Dingxin Wang; Sven Zuehlsdorff; Reed A Omary; Andrew C Larson |
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Publication Detail:
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Type: Journal Article; Research Support, N.I.H., Extramural Date: 2011-06-25 |
Journal Detail:
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Title: Magnetic resonance imaging Volume: 29 ISSN: 1873-5894 ISO Abbreviation: Magn Reson Imaging Publication Date: 2011 Oct |
Date Detail:
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Created Date: 2011-09-13 Completed Date: 2012-01-05 Revised Date: 2013-02-08 |
Medline Journal Info:
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Nlm Unique ID: 8214883 Medline TA: Magn Reson Imaging Country: Netherlands |
Other Details:
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Languages: eng Pagination: 1131-7 Citation Subset: IM |
Copyright Information:
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Copyright © 2011 Elsevier Inc. All rights reserved. |
Affiliation:
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Siemens Medical Solutions USA, Inc., Minneapolis, MN 55455, USA. dingxin.wang@siemens.com |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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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:
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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 |
| Comments/Corrections | |
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