Article Figures & Data
Figures
- FIG 1.
Axial contrast-weighted images of a 14-year-old boy who underwent brain MR imaging due to abnormal movement. By applying DLR, the overall image quality and image artifacts of the FAST-SyMRI appear significantly improved for all contrast-weighted images. FAST-SyMRI+DLR images show comparable or superior overall image quality relative to ST-SyMRI images. No significant difference is noted in lesion detectability between the FAST-SyMRI+DLR and the other 2 MR imaging protocols.
- FIG 2.
Comparison of the overall image quality among contrast-weighted images obtained with 3 synthetic MR imaging protocols. Each contrast-weighted image in 47 patients was rated on a 5-point Likert scale by 2 readers.
- FIG 3.
Scatterplots and Bland-Altman plot results for FAST-SyMRI+DLR versus ST-SyMRI (A) and FAST-SyMRI+DLR versus FAST-SyMRI (B). The linear regression lines fit to the data of 47 patients (solid blue line), which are shown along with 95% confidence intervals (dotted blue lines), represent a strong linear relationship with a robust fit between the tissue value measurements of GM and WM obtained from the 2 MR imaging protocols. Bland-Altman plots show mean differences (solid red line) and the mean difference (SD, 1.96) of the differences (dotted black line).
Tables
Synthetic MR imaging–acquisition parameters
ST-SyMRI FAST-SyMRI with/without DLRa TR (ms) 4000–4743 4000 TE (ms) 21.2/84.8 17.5/87.4 TI (ms) 4 Automatically calculated saturation delays Echo-train lengthb 12 Bandwidth (kHz) 22.73 31.25 Acceleration factor (ASSET) 2 3 Section thickness (mm)b 4 Spacing (mm)b 1 FOV (cm)b 23 Phase FOVb 0.8 Frequency matrix (m × n)b 308 No of sectionsb 24–32 NEXb 1 Scan time (min:sec) 5:04–6:01 3:28
