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Combination of 2D sensitivity encoding and 2D partial fourier techniques for improved acceleration in 3D contrast‐enhanced MR angiography
Author(s) -
Hu Houchun H.,
Madhuranthakam Ananth J.,
Kruger David G.,
Glockner James F.,
Riederer Stephen J.
Publication year - 2006
Publication title -
magnetic resonance in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.696
H-Index - 225
eISSN - 1522-2594
pISSN - 0740-3194
DOI - 10.1002/mrm.20742
Subject(s) - contrast (vision) , acceleration , fourier transform , sensitivity (control systems) , fourier analysis , angiography , encoding (memory) , nuclear magnetic resonance , magnetic resonance angiography , computer science , radiology , nuclear medicine , medicine , magnetic resonance imaging , physics , mathematics , artificial intelligence , mathematical analysis , classical mechanics , electronic engineering , engineering
Sensitivity encoding (SENSE) and partial Fourier (PF) techniques both reduce MRI acquisition time. Two‐dimensional SENSE uses coil sensitivities to unfold aliasing in the phase/slice‐encoding plane. One‐dimensional PF and homodyne reconstruction are routinely applied in the frequency/phase‐encoding plane to compensate for nonsampled k ‐space of the presumed real magnetization. Recently, a modified 3D elliptical centric acquisition was proposed to facilitate 2D‐PF and homodyne reconstruction on an undersampled phase/slice‐encoding plane. In this work we hypothesized that this 2D‐PF technique can be combined with 2D‐SENSE to achieve a greater acceleration factor than what each method can provide separately. Reconstruction of data whereby SENSE and PF are applied along the same axes is described. Contrast‐enhanced MR angiography (CE‐MRA) results from experiments using four receiver coils in phantom and volunteer studies are shown. In 11 volunteer studies, the SENSE‐PF‐homodyne technique using sevenfold acceleration (4× SENSE, 1.7× PF) consistently provided high‐diagnostic‐quality images with near 1‐mm isotropic resolution in acquisition times of <20 s. Magn Reson Med, 2006. © 2005 Wiley‐Liss, Inc.