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Optimization of T2-weighted imaging for shoulder magnetic resonance arthrography by synthetic magnetic resonance imaging

 Seung Hyun Lee  ;  Young Han Lee  ;  Seok Hahn  ;  Jaemoon Yang  ;  Ho-Taek Song  ;  Jin-Suck Suh 
 ACTA RADIOLOGICA, Vol.59(8) : 959-965, 2018 
Journal Title
Issue Date
Adult ; Aged ; Arthrography/methods ; Contrast Media ; Female ; Gadolinium DTPA ; Humans ; Image Enhancement/methods ; Image Processing, Computer-Assisted/methods* ; Magnetic Resonance Imaging/methods* ; Male ; Middle Aged ; Retrospective Studies ; Shoulder Injuries/diagnostic imaging* ; Shoulder Joint/diagnostic imaging*
Magnetic resonance arthrography (MRA) ; contrast optimization ; rotator cuff tear ; shoulder ; synthetic magnetic resonance imaging (MRI)
Background Synthetic magnetic resonance imaging (MRI) allows reformatting of various synthetic images by adjustment of scanning parameters such as repetition time (TR) and echo time (TE). Optimized MR images can be reformatted from T1, T2, and proton density (PD) values to achieve maximum tissue contrast between joint fluid and adjacent soft tissue. Purpose To demonstrate the method for optimization of TR and TE by synthetic MRI and to validate the optimized images by comparison with conventional shoulder MR arthrography (MRA) images. Material and Methods Thirty-seven shoulder MRA images acquired by synthetic MRI were retrospectively evaluated for PD, T1, and T2 values at the joint fluid and glenoid labrum. Differences in signal intensity between the fluid and labrum were observed between TR of 500-6000 ms and TE of 80-300 ms in T2-weighted (T2W) images. Conventional T2W and synthetic images were analyzed for diagnostic agreement of supraspinatus tendon abnormalities (kappa statistics) and image quality scores (one-way analysis of variance with post-hoc analysis). Results Optimized mean values of TR and TE were 2724.7 ± 1634.7 and 80.1 ± 0.4, respectively. Diagnostic agreement for supraspinatus tendon abnormalities between conventional and synthetic MR images was excellent (κ = 0.882). The mean image quality score of the joint space in optimized synthetic images was significantly higher compared with those in conventional and synthetic images (2.861 ± 0.351 vs. 2.556 ± 0.607 vs. 2.750 ± 0.439; P < 0.05). Conclusion Synthetic MRI with optimized TR and TE for shoulder MRA enables optimization of soft-tissue contrast.
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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
Song, Ho Taek(송호택) ORCID logo https://orcid.org/0000-0002-6655-2575
Yang, Jae Moon(양재문) ORCID logo https://orcid.org/0000-0001-7365-0395
Lee, Young Han(이영한) ORCID logo https://orcid.org/0000-0002-5602-391X
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