Compressed sensing MRI of different organs: ready for clinical daily practice?
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The aim was to evaluate the image quality and sensitivity to artifacts of compressed sensing (CS) acceleration technique, applied to 3D or breath-hold sequences in different clinical applications from brain to knee.
CS with an acceleration from 30 to 60% and conventional MRI sequences were performed in 10 different applications in 107 patients, leading to 120 comparisons. Readers were blinded to the technique for quantitative (contrast-to-noise ratio or functional measurements for cardiac cine) and qualitative (image quality, artifacts, diagnostic findings, and preference) image analyses.
No statistically significant difference in image quality or artifacts was found for each sequence except for the cardiac cine CS for one of both readers and for the wrist 3D proton density (PD)–weighted CS sequence which showed less motion artifacts due to the reduced acquisition time. The contrast-to-noise ratio was lower for the elbow CS sequence but not statistically different in all other applications. Diagnostic findings were similar between conventional and CS sequence for all the comparisons except for four cases where motion artifacts corrupted either the conventional or the CS sequence.
The evaluated CS sequences are ready to be used in clinical daily practice except for the elbow application which requires a lower acceleration. The CS factor should be tuned for each organ and sequence to obtain good image quality. It leads to 30% to 60% acceleration in the applications evaluated in this study which has a significant impact on clinical workflow.
• Clinical implementation of compressed sensing (CS) reduced scan times of at least 30% with only minor penalty in image quality and no change in diagnostic findings.
• The CS acceleration factor has to be tuned separately for each organ and sequence to guarantee similar image quality than conventional acquisition.
• At least 30% and up to 60% acceleration is feasible in specific sequences in clinical routine.
KeywordsMagnetic resonance imaging Acceleration Image processing, computer-assisted Data compression
Balanced turbo field echo
Fast field echo
Fluid-attenuated inversion recovery
Field of view
Multi-echo two-point Dixon
Magnetic resonance cholangiopancreatography
Spectral attenuated inversion recovery
Turbo spin echo
Volumetric isotropic T2w acquisition
The authors want to thank Philips for having provided the compressed SENSE option, the whole technician team for their implication in the sequence tuning and acquisition, in particular Ms. Mahjabeen Bontean and M. Cédric Garcia. We also gratefully thank the editor-in-chief Prof. Yves Menu and anonymous reviewers for their helpful comments.
The authors state that this work has not received any funding.
Compliance with ethical standards
The scientific guarantor of this publication is Prof. Maria Isabel Vargas.
Conflict of interest
The authors of this manuscript declare no relationships with any companies, whose products or services may be related to the subject matter of the article.
Statistics and biometry
No complex statistical methods were necessary for this paper.
Written informed consent was waived by the Institutional Review Board.
Institutional Review Board approval was obtained (CCER 2016-01821).
• cross-sectional study
• performed at one institution
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