Small field of view imaging using wavelet encoding with 2 dimensional RF pulses and gradient echo : phantom results

Download
  1. (PDF, 264 KB)
  2. Get@NRC: Small field of view imaging using wavelet encoding with 2 dimensional RF pulses and gradient echo : phantom results (Opens in a new window)
DOIResolve DOI: http://doi.org/10.1007/s10334-009-0193-z
AuthorSearch for: ; Search for:
TypeArticle
Journal titleMagnetic Resonace Materials in Physics, Biology and Medicine
Volume23
Issue1
Pages4552; # of pages: 8
SubjectWavelet encoding; Small FOV imaging; Spatially selective 2D RF excitation; Dynamic MRI
AbstractObject The objective of this work is to propose an imaging sequence based upon the wavelet encoding approach to provide MRI images free from folding artifacts, in the small field of view (FOV) regime, such as dynamic magnetic resonance imaging (MRI) studies. Materials and methods The method consists of using a 2D spatially selective RF excitation pulse inserted into a gradient- echo pulse sequence to excite spins within a determined plane where wavelet encoding is achieved in one direction and slice selection is performed in the second direction. Wavelet encoding allows for spatially localized excitation and consequently restricts the spins excited within a reduced FOV. It consists of varying, according to a predetermined scheme, the width and position of the profile of the so-called fast RF pulse of the 2D RF excitation pulse, to obey wavelet encoding translation and dilation conditions. This sequence is implemented on a 3 Tesla whole body Siemens scanner. Results Compared to Fourier encoding, the proposed technique tested on phantoms with different shapes and structures, is able to provide gradient-echo reduced FOV images free from aliased signals. Conclusion Wavelet encoding is suitable for small FOV imaging in dynamic MRI studies.
Publication date
LanguageEnglish
AffiliationNRC Institute for Biodiagnostics; National Research Council Canada
Peer reviewedYes
NPARC number17652975
Export citationExport as RIS
Report a correctionReport a correction
Record identifieraf82e89d-4fdb-40a2-8d29-7345e0d4c53c
Record created2011-04-03
Record modified2016-05-09
Bookmark and share
  • Share this page with Facebook (Opens in a new window)
  • Share this page with Twitter (Opens in a new window)
  • Share this page with Google+ (Opens in a new window)
  • Share this page with Delicious (Opens in a new window)