A Comparison of Techniques for Correcting Eddy-current and Motion-induced Distortions in Diffusion-weighted Echo-planar Images
نویسندگان
چکیده
منابع مشابه
On Correction of Eddy Current Induced Distortions in Diffusion Weighted Echo Planar Images with a Calibration on a Reference Phantom
K. A. Il'yasov, P. Zhilkin University Medical Center of Freiburg, Freiburg, Germany, Institute for Biodiagnostics, National Research Council, Winnipeg, Canada Synopsis In this work correction of eddy current induced distortions in DW EPI images with a calibration on a reference phantom has been systematically investigated. Such approach was implemented on four different clinical MR scanners and...
متن کاملCorrecting High Order Eddy Current Induced Distortion for Diffusion Weighted Echo Planar Imaging
INTRODUCTION It is well known that diffusion weighted echo planar imaging (DW-EPI) often suffers from direction dependent distortions due to diffusion gradient generated eddy currents. These distortions, if not corrected, can lead to misregistration among DW images of different directions and inaccuracies in any post processing operations involving DW image combination. Dual spin echo DW-EPI [1...
متن کاملElimination of eddy current artifacts in diffusion-weighted echo-planar images: the use of bipolar gradients.
Small gradient fields resulting from incompletely canceled eddy currents can cause geometric distortion in echo-planar images. Although this distortion is negligible in most echoplanar applications, the large gradient pulses used in diffusion-weighted echo-planar imaging can result in significant image distortion. In this report, it is shown that this distortion can be significantly reduced by ...
متن کاملQuantitative Simulation of Affine Registration for Correction of Eddy Current Distortions in Diffusion-Weighted Images
R. G. Nunes, I. Drobnjak, S. Clare, P. Jezzard, M. Jenkinson Centre for Functional MRI of the Brain, University of Oxford, Oxford, United Kingdom Introduction: Diffusion-weighted (DW) imaging has shown great potential for mapping white matter tracts in the brain [1]. In order to be able to infer on fibre structure, DW images need to be collected under a set of different diffusion gradient direc...
متن کاملHow to correct susceptibility distortions in spin-echo echo-planar images: application to diffusion tensor imaging.
Diffusion tensor imaging is often performed by acquiring a series of diffusion-weighted spin-echo echo-planar images with different direction diffusion gradients. A problem of echo-planar images is the geometrical distortions that obtain near junctions between tissues of differing magnetic susceptibility. This results in distorted diffusion-tensor maps. To resolve this we suggest acquiring two ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Magnetic Resonance in Medical Sciences
سال: 2019
ISSN: 1347-3182,1880-2206
DOI: 10.2463/mrms.tn.2018-0095