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Accelerating knee MR imaging: Compressed sensing in isotropic three-dimensional fast spin-echo sequence

 Seung Hyun Lee  ;  Young Han Lee  ;  Jin-Suck Suh 
 Magnetic Resonance Imaging, Vol.46 : 90-97, 2018 
Journal Title
 Magnetic Resonance Imaging 
Issue Date
Adolescent ; Adult ; Aged ; 80 and over Aged ; Data Compression ; Female ; Humans ; Computer-Assisted *Image Interpretation ; Three-Dimensional *Imaging ; Knee/diagnostic imaging ; Knee Joint/*diagnostic imaging ; *Magnetic Resonance Imaging ; Male ; Middle Aged ; Statistical Models ; Imaging Phantoms ; Pressure ; Reproducibility of Results ; Retrospective Studies ; Sensitivity and Specificity ; Signal-To-Noise Ratio ; Young Adult
Compressed sensing ; Knee ; Magnetic resonance imaging ; Parallel imaging ; Sparsity
PURPOSE: To compare image quality between compressed sensing (CS)-3D-fast spin-echo (FSE) and conventional 3D-FSE sequences for knee magnetic resonance imaging (MRI). METHODS: Knee MRI of 43 patients (male:female, 14:29; mean age, 53years) were acquired using conventional and CS-3D-FSE with an acceleration factor of 1.5. Overall image quality was assessed by correlation coefficient, root-mean-square error (RMSE), and structural similarity (SSIM) index. Regional image quality was evaluated using signal-to-noise ratios (SNRs) and contrast-to-noise ratios (CNRs). Subjective image quality was evaluated using a four-point scale. Diagnostic agreement for meniscal lesions between the two sequences was evaluated. RESULTS: The scan time was reduced from 7:14-8:08 to 4:53-5:08 with CS. A strong positive correlation was observed between data of the two sequences (mean r=0.880). The RMSE (mean, 126.861) and SSIM index (mean, 0.987) were acceptable. The SNRs and CNRs were not significantly different between the two sequences (P>0.05, each). There were no significant differences in the evaluation of the menisci and cruciate ligaments, while the CS images demonstrated inferior quality of cartilage-subchondral bone delineation. Diagnostic agreement for meniscal lesions between the two sequences was very good (kappa=0.943-1). CONCLUSION: Compressed sensing-3D-FSE knee MRI produces images of acceptable quality while reducing scan time.
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1. College of Medicine (의과대학) > Dept. of Radiology (영상의학교실) > 1. Journal Papers
Yonsei Authors
Suh, Jin Suck(서진석) ORCID logo https://orcid.org/0000-0001-9455-9240
Lee, Young Han(이영한) ORCID logo https://orcid.org/0000-0002-5602-391X
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