Improving cardiac cine MRI on 3T using 2D k-t accelerated auto-calibrating parallel imaging
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KeywordsApical Slice Outer Band Banding Artifact Cardiac Cine Residual Artifact
Recently, 3D cine has gained attention due to its capability for single breath-hold volumetric measurement . Nonetheless, conventional 2D cine maintains two intrinsic advantages, namely, its superior blood-myocardium contrast owing to blood in-flow effects and reduced SSFP banding artifacts with more localized slice-by-slice shimming. These advantages are more prominent at high field. This work intends to optimize a k-t acceleration method, kat ARC , for 2D cine and preliminarily investigate its performance vs. 3D cine at 3T.
In conclusion, the proposed approach is promising for highly accelerated 2D cine MRI. The 2D cine approach provides improved contrast and robustness vs. 3D cine and thus may be more reliable on 3T. 2D acquisition further enables flexible slice-specific selection of acceleration based on the extent of signal dynamics on each slice. Based on our results, the projected 2D cine scan time can be reduced to ~2 s/slice and totally two 16 s breath-holds for 16 slices - a reduction of 4-5x vs. full acquisition
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