In this section
@article{Wang:2015:10.1002/mrm.25478,
author = {Wang, H and Bangerter, NK and Park, DJ and Adluru, G and Kholmovski, EG and Xu, J and DiBella, E},
doi = {10.1002/mrm.25478},
journal = {Magnetic Resonance in Medicine},
pages = {1070--1076},
title = {Comparison of centric and reversecentric trajectories for highly accelerated threedimensional saturation recovery cardiac perfusion imaging},
url = {http://dx.doi.org/10.1002/mrm.25478},
volume = {74},
year = {2015}
}
TY - JOUR
AB - <jats:sec><jats:title>Purpose</jats:title><jats:p>Highly undersampled threedimensional (3D) saturationrecovery sequences are affected by kspace trajectory since the magnetization does not reach steady state during the acquisition and the slab excitation profile yields different flip angles in different slices. This study compares centric and reversecentric 3D cardiac perfusion imaging.</jats:p></jats:sec><jats:sec><jats:title>Methods</jats:title><jats:p>An undersampled (98 phase encodes) 3D ECGgated saturationrecovery sequence that alternates centric and reversecentric acquisitions each time frame was used to image phantoms and in vivo subjects. Flip angle variation across the slices was measured, and contrast with each trajectory was analyzed via Bloch simulation.</jats:p></jats:sec><jats:sec><jats:title>Results</jats:title><jats:p>Significant variations in flip angle were observed across slices, leading to larger signal variation across slices for the centric acquisition. In simulation, severe transient artifacts were observed when using the centric trajectory with higher flip angles, placing practical limits on the maximum flip angle used. The reversecentric trajectory provided less contrast, but was more robust to flip angle variations.</jats:p></jats:sec><jats:sec><jats:title>Conclusion</jats:title><jats:p>Both of the kspace trajectories can provide reasonable image quality. The centric trajectory can have higher CNR, but is more sensitive to flip angle variation. The reversecentric trajectory is more robust to flip angle variation. Magn Reson Med 74:1070–1076, 2015. © 2014 Wiley Periodicals, Inc.</jats:p></jats:sec>
AU - Wang,H
AU - Bangerter,NK
AU - Park,DJ
AU - Adluru,G
AU - Kholmovski,EG
AU - Xu,J
AU - DiBella,E
DO - 10.1002/mrm.25478
EP - 1076
PY - 2015///
SN - 0740-3194
SP - 1070
TI - Comparison of centric and reversecentric trajectories for highly accelerated threedimensional saturation recovery cardiac perfusion imaging
T2 - Magnetic Resonance in Medicine
UR - http://dx.doi.org/10.1002/mrm.25478
UR - https://doi.org/10.1002/mrm.25478
VL - 74
ER -
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