Simultaneous bilateral-knee MR imaging.

摘要: PURPOSE To demonstrate and evaluate the scan time quantitative accuracy of simultaneous bilateral-knee imaging compared with single-knee acquisitions. METHODS Hardware modifications safety testing was performed to enable MR two 16-channel flexible coil arrays. Noise covariance sensitivity-encoding g-factor maps for dual-coil-array configuration were computed cross-talk noise amplification. Ten healthy volunteers imaged on a 3T MRI scanner both single-coil-array configurations. Two experienced musculoskeletal radiologists relative image quality between blinded pairs acquired each configuration. Differences in T2 relaxation measurements acquisitions standard repeatability using Bland-Altman analysis. RESULTS The mean g-factors low accelerations up 6 right-left direction, minimal observed Image ratings various joint tissues showed no difference 89% (95% confidence interval: 85-93%) rated pairs, only small differences ("slightly better" or "slightly worse") observed. single-coil similar limits agreement concordance correlation coefficients (limits agreement: -0.93 1.99 ms; CCC: 0.97 0.96-0.98)), -2.07 1.96 0.95-0.98)). CONCLUSION A bilateral coil-array setup can knees simultaneously times as conventional unilateral knee scans, comparable accuracy. This has potential improve value evaluations. Magn Reson Med 80:529-537, 2018. © 2017 International Society Magnetic Resonance Medicine.