Table 1.
Sequence parameters of T2-weighted 2D Dixon and SPAIR T2-prepared 3D TSE with SENSE and CSAI 5x acceleration. TR, repetition time; TE, echo time; ms, milliseconds; AP, Anterior-posterior; RL, right-left; RF, radio frequency; TSE, turbo spin echo; FOV, field of view; min, minutes; SPAIR, spectral adiabatic inversion recovery; FH: feet-head.
Fig 1.
Flow-chart of the scanning procedure.
FSHD, facioscapulohumeral muscular dystrophy; T2w, T2 weighted; TSE, turbo spin echo; T2w, muscle water T2.
Fig 2.
Representative T2-prepared 3D TSE with SPAIR raw image data of first echo (top three rows) and last echo (lower three rows) of three patients (a, b, c) with standard SENSE (left) and CSAI 5x (right) acceleration.
TSE, turbo spin echo; SPAIR, spectral adiabatic inversion recovery.
Fig 3.
Exemplary T2w maps from three representative patients (a, b, c) with SENSE and CSAI 5x acceleration, colorbar on the right.
Fig 4.
Correlation analysis of T2w values from T2w mapping with SENSE versus T2w mapping with CSAI 5x from session 1.1.
Fig 5.
Bland-Altman plot of T2w values from T2w mapping with SENSE versus T2w mapping with CSAI 5x from session 1.1.
Six measurements were obtained from each of the nine patients, respectively. Bias (0.27 ms) is indicated as a red line, upper (2.01 ms) and lower (-1.47 ms) limits of agreement are indicated as green lines, and the corresponding 95% confidence interval are shown as broad dashed lines in the corresponding color.
Table 2.
ICC for intra- and inter-session reproducibility of T2w mapping with SENSE and CSAI 5x. ICC, intraclass correlation coefficient; CI, confidence interval.