scholarly journals View angle tilting echo planar imaging for distortion correction

2011 ◽  
Vol 68 (4) ◽  
pp. 1211-1219 ◽  
Author(s):  
Sinyeob Ahn ◽  
Xiaoping P. Hu
Keyword(s):  
Echo Planar Imaging ◽  
Distortion Correction ◽  
Planar Imaging ◽  
Echo Planar ◽  
View Angle Tilting

scholarly journals Susceptibility‐induced distortion correction in hyperpolarized echo planar imaging

2017 ◽  
Vol 79 (4) ◽  
pp. 2135-2141 ◽  
Author(s):  
Jack J. Miller ◽  
Angus Z. Lau ◽  
Damian J. Tyler
Keyword(s):  
Echo Planar Imaging ◽  
Distortion Correction ◽  
Planar Imaging ◽  
Echo Planar

scholarly journals EPI distortion correction for simultaneous human brain stimulation and imaging at 3T

2019 ◽  
Author(s):  
Hyuntaek Oh ◽  
Jung Hwan Kim ◽  
Jeffrey M. Yau
Keyword(s):  
Human Brain ◽  
Resting State ◽  
Network Architecture ◽  
Motor Behavior ◽  
Resting State Fmri ◽  
Echo Planar Imaging ◽  
Distortion Correction ◽  
Planar Imaging ◽  
Brain Scans ◽  
Echo Planar

AbstractTranscranial magnetic stimulation (TMS) can be paired with functional magnetic resonance imaging (fMRI) in simultaneous TMS-fMRI experiments. These multimodal experiments enable causal probing of network architecture in the human brain which can complement alternative network mapping approaches. Critically, merely introducing the TMS coil into the scanner environment can sometimes produce substantial magnetic field inhomogeneities and spatial distortions which limit the utility of simultaneous TMS-fMRI. We assessed the efficacy of point spread function corrected echo planar imaging (PSF-EPI) in correcting for the field inhomogeneities associated with a TMS coil at 3T. In phantom and brain scans, we quantitatively compared the coil-induced distortion artifacts measured in PSF-EPI scans to artifacts measured in conventional echo-planar imaging (EPI) and a simultaneous multi-slice sequence (SMS)-EPI. While we observed substantial coil-related artifacts in the data produced by the conventional EPI and SMS sequences, PSF-EPI produced data that had significantly greater signal-to-noise and less distortions. In phantom scans with the PSF-EPI sequence, we also characterized the temporal profile of dynamic artifacts associated with TMS delivery and found that image quality remained high as long as the TMS pulse preceded the RF excitation pulses by at least 50ms. Lastly, we validated the PSF-EPI sequence in human brain scans involving TMS and motor behavior as well as resting state fMRI scans. Our collective results demonstrate the superiority of PSF-EPI over conventional EPI and SMS sequences for simultaneous TMS-fMRI when coil-related artifacts are a concern. The ability to collect high quality resting state fMRI data in the same session as the simultaneous TMS-fMRI experiment offers a unique opportunity to interrogate network architecture in the human brain.

scholarly journals Real-time geometric distortion correction for interventional imaging with echo-planar imaging (EPI)

2009 ◽  
Vol 61 (4) ◽  
pp. 994-1000 ◽  
Author(s):  
Iulius Dragonu ◽  
Baudouin Denis de Senneville ◽  
Bruno Quesson ◽  
Chrit Moonen ◽  
Mario Ries
Keyword(s):  
Real Time ◽  
Echo Planar Imaging ◽  
Distortion Correction ◽  
Geometric Distortion ◽  
Planar Imaging ◽  
Interventional Imaging ◽  
Echo Planar

scholarly journals Gaussian process modeling for image distortion correction in echo planar imaging

2008 ◽  
Vol 59 (3) ◽  
pp. 598-606 ◽  
Author(s):  
Joseph W. Stevick ◽  
Sally G. Harding ◽  
Ulrich Paquet ◽  
Richard E. Ansorge ◽  
T. Adrian Carpenter ◽  
...  
Keyword(s):  
Gaussian Process ◽  
Process Modeling ◽  
Image Distortion ◽  
Echo Planar Imaging ◽  
Distortion Correction ◽  
Planar Imaging ◽  
Echo Planar ◽  
Gaussian Process Modeling
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