| Chemical shift imaging in the head and neck at 3T: initial results. | |
| | |
MedLine Citation:
|
PMID: 21031532 Owner: NLM Status: In-Process |
Abstract/OtherAbstract:
|
PURPOSE: To determine the optimal method to correct air and tissue susceptibility differences in the head and neck to allow proton ((1)H) chemical shift imaging (CSI) to be performed at 3T. MATERIALS AND METHODS: Shimming protocols (iterative, first-order, and second-order) and perfluorocarbon (PFC) pads were evaluated using water peak linewidth measurements obtained from single-voxel magnetic resonance spectroscopy (MRS) on a head and neck phantom. After optimization of the technique, CSI was then tested on 14 patients with head and neck tumors. RESULTS: Second-order shimming (water peak linewidth, 4.6 Hz) performed significantly (P < 0.001) better than first-order (16.5 Hz) and iterative shimming (18 Hz) and the water peak linewidth was significantly reduced using PFC pads (P < 0.001). Using second-order shimming and PFC pads, CSI was successful in 10 patients with nodal metastases (n = 8) and benign tumors (n = 2) and unsuccessful in four patients with primary tumors along the aerodigestive tract. CONCLUSION: Proton CSI can be successfully performed in the head and neck using second-order shimming and PFC pads to correct air and tissue susceptibility differences. CSI was more successfully performed on nodal metastases, while CSI for primary tumors along the aerodigestive tract remains a challenge. |
| | |
Authors:
|
David K W Yeung; Kwan-Ying Fong; Queenie C C Chan; Ann D King |
Publication Detail:
|
Type: Journal Article |
Journal Detail:
|
Title: Journal of magnetic resonance imaging : JMRI Volume: 32 ISSN: 1522-2586 ISO Abbreviation: J Magn Reson Imaging Publication Date: 2010 Nov |
Date Detail:
|
Created Date: 2010-10-29 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 9105850 Medline TA: J Magn Reson Imaging Country: United States |
Other Details:
|
Languages: eng Pagination: 1248-54 Citation Subset: IM |
Copyright Information:
|
© 2010 Wiley-Liss, Inc. |
Affiliation:
|
Department of Diagnostic Radiology and Organ Imaging, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong SAR, China. dkyeung@cuhk.edu.hk |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Method for simultaneous voxel-based morphometry of the brain and cervical spinal cord area measureme...
Next Document: Noncontrast SSFP pulmonary vein magnetic resonance angiography: impact of off-resonance and flow.