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Clinical performance of contrast enhanced abdominal pediatric MRI with fast combined parallel imaging compressed sensing reconstruction
Author(s) -
Zhang Tao,
Chowdhury Shilpy,
Lustig Michael,
Barth Richard A.,
Alley Marcus T.,
Grafendorfer Thomas,
Calderon Paul D.,
Robb Fraser J.L.,
Pauly John M.,
Vasanawala Shreyas S.
Publication year - 2014
Publication title -
journal of magnetic resonance imaging
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.563
H-Index - 160
eISSN - 1522-2586
pISSN - 1053-1807
DOI - 10.1002/jmri.24333
Subject(s) - undersampling , compressed sensing , image quality , wilcoxon signed rank test , computer science , medicine , scanner , iterative reconstruction , radiology , nuclear medicine , artificial intelligence , image (mathematics) , mann–whitney u test
Purpose To deploy clinically, a combined parallel imaging compressed sensing method with coil compression that achieves a rapid image reconstruction, and assess its clinical performance in contrast‐enhanced abdominal pediatric MRI. Materials and Methods With Institutional Review Board approval and informed patient consent/assent, 29 consecutive pediatric patients were recruited. Dynamic contrast‐enhanced MRI was acquired on a 3 Tesla scanner using a dedicated 32‐channel pediatric coil and a three‐dimensional SPGR sequence, with pseudo‐random undersampling at a high acceleration (R = 7.2). Undersampled data were reconstructed with three methods: a traditional parallel imaging method and a combined parallel imaging compressed sensing method with and without coil compression. The three sets of images were evaluated independently and blindly by two radiologists at one siting, for overall image quality and delineation of anatomical structures. Wilcoxon tests were performed to test the hypothesis that there was no significant difference in the evaluations, and interobserver agreement was analyzed. Results Fast reconstruction with coil compression did not deteriorate image quality. The mean score of structural delineation of the fast reconstruction was 4.1 on a 5‐point scale, significantly better ( P < 0.05) than traditional parallel imaging (mean score 3.1). Fair to substantial interobserver agreement was reached in structural delineation assessment. Conclusion A fast combined parallel imaging compressed sensing method is feasible in a pediatric clinical setting. Preliminary results suggest it may improve structural delineation over parallel imaging. J. Magn. Reson. Imaging 2014;40:13–25 . © 2013 Wiley Periodicals, Inc .