| Highly localized positive contrast of small paramagnetic objects using 3D center-out radial sampling with off-resonance reception. | |
| | |
MedLine Citation:
|
PMID: 20740656 Owner: NLM Status: In-Process |
Abstract/OtherAbstract:
|
In this article, we present a 3D imaging technique, applying center-out RAdial Sampling with Off-Resonance reception, to accurately depict and localize small paramagnetic objects with high positive contrast while suppressing long T(2) (*) components. The center-out RAdial Sampling with Off-Resonance reception imaging technique is a fully frequency-encoded 3D ultrashort echo time acquisition method, which uses a large excitation bandwidth and off-resonance reception. By manually introducing an offset, Δf(0), to the central reception frequency (f(0)), the typical radial signal pileup observed in 3D center-out sampling caused by a dipolar magnetic field disturbance can be shifted toward the source of the field disturbance, resulting in a hyperintense signal at the magnetic center of the small paramagnetic object. This was demonstrated both theoretically and using 1D time domain simulations. Experimental verification was done in a gel phantom and in inhomogeneous porcine tissue containing various objects with very different geometry and susceptibility, namely, subvoxel stainless steel spheres, a puncture needle, and paramagnetic brachytherapy seeds. In all cases, center-out RAdial Sampling with Off-Resonance reception was shown to generate high positive contrast exactly at the location of the paramagnetic object, as was confirmed by X-ray computed tomography. |
| | |
Authors:
|
Peter R Seevinck; Hendrik de Leeuw; Clemens Bos; Chris J G Bakker |
Related Documents
:
|
9797886 - Spiral computed tomography: principles and clinical use. 15798416 - Three-dimensional ct virtual endoscopy in the detection of simulated tumors in a novel ... 9699076 - Three-dimensional computer assisted magnetic resonance imaging for neurosurgical planni... 8377196 - Crossbridges in the complete unit cell of rigor insect flight muscle imaged by three-di... 11456376 - Radiological imaging for the diagnosis of bone metastases. 1313346 - Magnetic resonance behaviour of lipiodol. |
Publication Detail:
|
Type: Journal Article |
Journal Detail:
|
Title: Magnetic resonance in medicine : official journal of the Society of Magnetic Resonance in Medicine / Society of Magnetic Resonance in Medicine Volume: 65 ISSN: 1522-2594 ISO Abbreviation: Magn Reson Med Publication Date: 2011 Jan |
Date Detail:
|
Created Date: 2010-12-20 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 8505245 Medline TA: Magn Reson Med Country: United States |
Other Details:
|
Languages: eng Pagination: 146-56 Citation Subset: IM |
Copyright Information:
|
© 2010 Wiley-Liss, Inc. |
Affiliation:
|
Department of Radiology, Image Sciences Institute, University Medical Center Utrecht, Utrecht, The Netherlands. p.seevinck@umcutrecht.nl |
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: Determination of spin compartment in arterial spin labeling MRI.
Next Document: Performance of external and internal coil configurations for prostate investigations at 7 T.