| Magnetic flux density reconstruction using interleaved partial Fourier acquisitions in MREIT. | |
| | |
MedLine Citation:
|
PMID: 21386139 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
|
Magnetic resonance electrical impedance tomography (MREIT) has been introduced as a non-invasive modality to visualize the internal conductivity and/or current density of an electrically conductive object by the injection of current. In order to measure a magnetic flux density signal in MREIT, the phase difference approach in an interleaved encoding scheme cancels the systematic artifacts accumulated in phase signals and also reduces the random noise effect. However, it is important to reduce scan duration maintaining spatial resolution and sufficient contrast, in order to allow for practical in vivo implementation of MREIT. The purpose of this paper is to develop a coupled partial Fourier strategy in the interleaved sampling in order to reduce the total imaging time for an MREIT acquisition, whilst maintaining an SNR of the measured magnetic flux density comparable to what is achieved with complete k-space data. The proposed method uses two key steps: one is to update the magnetic flux density by updating the complex densities using the partially interleaved k-space data and the other is to fill in the missing k-space data iteratively using the updated background field inhomogeneity and magnetic flux density data. Results from numerical simulations and animal experiments demonstrate that the proposed method reduces considerably the scanning time and provides resolution of the recovered B(z) comparable to what is obtained from complete k-space data. |
| | |
Authors:
|
Hee Myung Park; Hyun Soo Nam; Oh In Kwon |
Related Documents
:
|
7793779 - Utility of magnetic resonance imaging and ultrasonography in diagnosing breast implant ... 12585659 - Maximum intensity projection analysis in magnetic resonance of the breast. 17892919 - Assessment of the residual error in soft tissue setup in patients undergoing partial br... 18941069 - Radiofrequency identification tags for preoperative tumor localization: proof of concept. 3237149 - Routine quality control tests for film-screen mammographic systems with automatic expos... 14599539 - Magnetic resonance imaging of intraductal papilloma of the breast. 19336849 - Radio frequency noise from clinical linear accelerators. 17368219 - Abdominal multislice ct for obese patients: effect on image quality and radiation dose ... 3763919 - Imaging of the kock continent ileal urinary reservoir. |
Publication Detail:
|
Type: JOURNAL ARTICLE Date: 2011-3-08 |
Journal Detail:
|
Title: Physics in medicine and biology Volume: 56 ISSN: 1361-6560 ISO Abbreviation: - Publication Date: 2011 Mar |
Date Detail:
|
Created Date: 2011-3-9 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 0401220 Medline TA: Phys Med Biol Country: - |
Other Details:
|
Languages: ENG Pagination: 2059-2073 Citation Subset: - |
Affiliation:
|
Department of Veterinary Internal Medicine, College of Veterinary Medicine, Konkuk University, Korea. |
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: Chinese adult anatomical models and the application in evaluation of RF exposures.
Next Document: Modeling late rectal toxicities based on a parameterized representation of the 3D dose distribution.