Highly Accelerated Acquisition and Homogeneous Image Reconstruction with Rotating RF Coil Array at 7 T—A Phantom Based Study

Li, Mingyan, Zuo, Zhentao, Jin, Jin, Xue, Rong, Trakic, Adnan, Weber, Ewald, Liu, Feng and Crozier, Stuart (2014) Highly Accelerated Acquisition and Homogeneous Image Reconstruction with Rotating RF Coil Array at 7 T—A Phantom Based Study. Journal of Magnetic Resonance, 240 102-112. doi:10.1016/j.jmr.2013.11.002


Author Li, Mingyan
Zuo, Zhentao
Jin, Jin
Xue, Rong
Trakic, Adnan
Weber, Ewald
Liu, Feng
Crozier, Stuart
Title Highly Accelerated Acquisition and Homogeneous Image Reconstruction with Rotating RF Coil Array at 7 T—A Phantom Based Study
Journal name Journal of Magnetic Resonance   Check publisher's open access policy
ISSN 1090-7807
1096-0856
Publication date 2014-03-01
Year available 2013
Sub-type Article (original research)
DOI 10.1016/j.jmr.2013.11.002
Open Access Status Not Open Access
Volume 240
Start page 102
End page 112
Total pages 11
Place of publication Maryland Heights, MO United States
Publisher Academic Press
Language eng
Formatted abstract
Parallel imaging (PI) is widely used for imaging acceleration by means of coil spatial sensitivities associated with phased array coils (PACs). By employing a time-division multiplexing technique, a single-channel rotating radiofrequency coil (RRFC) provides an alternative method to reduce scan time. Strategically combining these two concepts could provide enhanced acceleration and efficiency. In this work, the imaging acceleration ability and homogeneous image reconstruction strategy of 4-element rotating radiofrequency coil array (RRFCA) was numerically investigated and experimental validated at 7 T with a homogeneous phantom. Each coil of RRFCA was capable of acquiring a large number of sensitivity profiles,
leading to a better acceleration performance illustrated by the improved geometry-maps that have lower maximum values and more uniform distributions compared to 4- and 8-element stationary arrays.  A reconstruction algorithm, rotating SENSitivity Encoding (rotating SENSE), was proposed to provide image reconstruction. Additionally, by optimally choosing the angular sampling positions and transmit profiles under the rotating scheme, phantom images could be faithfully reconstructed. The results indicate that, the proposed technique is able to provide homogeneous reconstructions with overall higher and more uniform signal-to-noise ratio (SNR) distributions at high reduction factors. It is hoped that,
by employing the high imaging acceleration and homogeneous imaging reconstruction ability of RRFCA, the proposed method will facilitate human imaging for ultra high field MRI.
Keyword Phased array coils
Rotating RF coil (RRFC)
Parallel imaging
Phantom experiment
Homogeneous image reconstruction
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2014 Collection
School of Information Technology and Electrical Engineering Publications
 
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Created: Wed, 18 Dec 2013, 09:28:22 EST by Mr Jin Jin on behalf of School of Information Technol and Elec Engineering