scholarly journals Parallel imaging with asymmetric acceleration to reduce Gibbs artifacts and to increase signal-to-noise ratio of the gradient echo echo-planar imaging sequence for functional MRI

2011 ◽  
Vol 67 (2) ◽  
pp. 419-427 ◽  
Author(s):  
Kwan-Jin Jung ◽  
Tiejun Zhao
Keyword(s):  
Functional Mri ◽  
Parallel Imaging ◽  
Signal To Noise Ratio ◽  
Echo Planar Imaging ◽  
Gradient Echo ◽  
Planar Imaging ◽  
Signal To Noise ◽  
Imaging Sequence ◽  
Echo Planar ◽  
Echo Planar Imaging Sequence

The Influence of Acquisition Parameters in 3T Echo Planar Imaging: Nyquist Ghost and Signal-to-Noise Ratio Analysis

NeuroImage ◽  
2009 ◽  
Vol 47 ◽  
pp. S81
Author(s):  
A.F. Borgonove ◽  
M.G. Otaduy ◽  
L.F. Gamarra ◽  
E. Amaro
Keyword(s):  
Signal To Noise Ratio ◽  
Echo Planar Imaging ◽  
Ratio Analysis ◽  
Planar Imaging ◽  
Signal To Noise ◽  
Noise Ratio ◽  
Echo Planar

scholarly journals Improvements in parallel imaging accelerated functional MRI using multiecho echo-planar imaging

2010 ◽  
Vol 63 (4) ◽  
pp. 959-969 ◽  
Author(s):  
Heiko Schmiedeskamp ◽  
Rexford D. Newbould ◽  
Laura J. Pisani ◽  
Stefan Skare ◽  
Gary H. Glover ◽  
...  
Keyword(s):  
Functional Mri ◽  
Parallel Imaging ◽  
Echo Planar Imaging ◽  
Planar Imaging ◽  
Echo Planar

scholarly journals Optimizing signal-to-noise ratio of high-resolution parallel single-shot diffusion-weighted echo-planar imaging at ultrahigh field strengths

2011 ◽  
Vol 67 (3) ◽  
pp. 679-690 ◽  
Author(s):  
Carolin Reischauer ◽  
Robert S. Vorburger ◽  
Bertram J. Wilm ◽  
Thomas Jaermann ◽  
Peter Boesiger
Keyword(s):  
High Resolution ◽  
Signal To Noise Ratio ◽  
Echo Planar Imaging ◽  
Single Shot ◽  
Planar Imaging ◽  
Signal To Noise ◽  
Ultrahigh Field ◽  
Diffusion Weighted ◽  
Echo Planar ◽  
Field Strengths

scholarly journals Diffusion Tensor Imaging of the Normal Pediatric Spinal Cord Using an Inner Field of View Echo-Planar Imaging Sequence

2012 ◽  
Vol 33 (6) ◽  
pp. 1127-1133 ◽  
Author(s):  
N. Barakat ◽  
F.B. Mohamed ◽  
L.N. Hunter ◽  
P. Shah ◽  
S.H. Faro ◽  
...  
Keyword(s):  
Spinal Cord ◽  
Diffusion Tensor Imaging ◽  
Diffusion Tensor ◽  
Echo Planar Imaging ◽  
Field Of View ◽  
Planar Imaging ◽  
Imaging Sequence ◽  
Echo Planar ◽  
Echo Planar Imaging Sequence

scholarly journals Segmented K-Space Blipped-Controlled Aliasing in Parallel Imaging (Skipped-CAIPI) for High Spatiotemporal Resolution Echo Planar Imaging

2020 ◽  
Author(s):  
Rüdiger Stirnberg ◽  
Tony Stöcker
Keyword(s):  
High Resolution ◽  
Parallel Imaging ◽  
Echo Planar Imaging ◽  
Planar Imaging ◽  
Signal To Noise ◽  
Spatiotemporal Resolution ◽  
High Spatiotemporal Resolution ◽  
Selective Approach ◽  
Echo Planar ◽  
Phase Encode

AbstractPurposeA segmented k-space blipped-CAIPI (skipped-CAIPI) sampling strategy for echo planar imaging (EPI) is proposed, which allows for a flexible choice of EPI factor and phase encode bandwidth independent of the controlled aliasing (CAIPIRINHA) pattern.Theory and MethodsWith previously proposed approaches, exactly two EPI trajectories were possible given a specific CAIPIRINHA pattern: either with slice gradient blips (blipped-CAIPI), or following a shot-selective approach (higher resolution). Recently, interleaved multi-shot segmentation along shot-selective CAIPI trajectories has been applied for high-resolution anatomical imaging. For more flexibility and a broader range of applications, we propose segmentation along any blipped-CAIPI trajectory. Thus, all EPI factors and phase encode bandwidths available with traditional segmented EPI can be combined with controlled aliasing.ResultsTemporal signal-to-noise ratios of moderate-to-high-resolution time series acquisitions at varying undersampling factors demonstrate beneficial sampling alternatives to blipped-CAIPI or shot-selective CAIPI. Rapid high-resolution scans furthermore demonstrate SNR-efficient and motion-robust structural imaging with almost arbitrary EPI factor and minimal noise penalty.ConclusionsSkipped-CAIPI sampling increases protocol flexibility for high spatiotemporal resolution EPI. In terms of signal-to-noise ratio and efficiency, high-resolution functional or structural scans benefit vastly from a free choice of the CAIPIRINHA pattern. Even at moderate resolutions, the independence of sampling pattern, echo time and image matrix size is valuable for optimized functional protocol design. Although demonstrated with 3D-EPI, skipped-CAIPI is also applicable with simultaneous multislice EPI.

scholarly journals Improvement of temporal signal-to-noise ratio of GRAPPA accelerated echo planar imaging using a FLASH based calibration scan

2015 ◽  
Vol 75 (6) ◽  
pp. 2362-2371 ◽  
Author(s):  
S. Lalith Talagala ◽  
Joelle E. Sarlls ◽  
Siyuan Liu ◽  
Souheil J. Inati
Keyword(s):  
Signal To Noise Ratio ◽  
Echo Planar Imaging ◽  
Planar Imaging ◽  
Signal To Noise ◽  
Noise Ratio ◽  
Echo Planar

Rapid and accurate measurement of transverse relaxation times using a single shot multi-echo echo-planar imaging sequence

2004 ◽  
Vol 22 (7) ◽  
pp. 1031-1037 ◽  
Author(s):  
Damian J Tyler ◽  
Rachel J Moore ◽  
Luca Marciani ◽  
Penny A Gowland
Keyword(s):  
Relaxation Times ◽  
Echo Planar Imaging ◽  
Single Shot ◽  
Planar Imaging ◽  
Transverse Relaxation ◽  
Imaging Sequence ◽  
Echo Planar ◽  
Echo Planar Imaging Sequence
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