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Abstract #4206

Free-Breathing Dynamic Contrast-Enhanced MRI of the Liver with Radial Golden-Angle Sampling Scheme and Advanced Compressed-Sensing Reconstruction.

Hersh Chandarana1, Li Feng1, Tobias Kai Block1, Andrew B. Rosenkrantz1, Ruth P. Lim1, Dewey Chu1, Daniel K. Sodickson1, Ricardo Otazo1

1Radiology, NYU Langone Medical Center, New York, NY, United States

Dynamic post-contrast liver MR examination is performed with Cartesian k-space sampling in a breath-hold (BH). However, this results in non-diagnostic images in patients who cannot adequately breath-hold. Purpose of this study was to compare image quality of free-breathing radial (interleaved angle-bisection and golden angle) acquisition schemes reconstructed with either view sharing (KWIC) or joint compressed-sensing and parallel imaging reconstruction (CS-PI), to conventional BH exam. Our results demonstrate that free-breathing radial golden angle trajectory continuous acquisition scheme with CS-PI reconstruction has image quality comparable to a breath-hold exam and significantly better than interleaved radial acquisition with KWIC or CS-PI reconstruction.

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Keywords

accelerated accelerations achieved acquisition acquisitions adaptive adequately aliasing applied appropriate approved arterial artifacts assessment better bisection blinded blurring board bolus breath breathing calibration capacity certified characterization coil combination combining comparable compliant compressed conjugate contrast corrected correlations customer delay desirable detection developed diagnostic dynamic enhanced enhancement ensure essential exam examinations excellent except expense exploited free gadolinium golden good gridded healthy helps highest hold incoherent incorporates independently indicating initiated injection interleaved interpolated interpolates invest joint limitation limited liver long longer manipulation matching minimizing mixed model motion operator package parallel patients pattern peak permits portal post presence projection prospective quality radial radiology random rasps reader readers recently reconstruct reconstructed reconstruction reconstructions reduce respiratory rotation rotations sampling scheme schemes score scored sense sensing sensitivities sensitivity sharing significantly slice software song space sparse spokes star subject subjects subsequently suited table temporal timing trajectories transformation usually utility variance variation vendor venous vibe view views whereas year years