Table 1 MR imaging parameters of diffusion-weighted imaging (DWI) sequences
Achieva | Aera | DISCOVERY MR750 | Ingenia | Multiva | Prisma | SIGNA EXCITE | uMR 790 | Over all | |
|---|---|---|---|---|---|---|---|---|---|
(N = 5) | (N = 31) | (N = 87) | (N = 22) | (N = 9) | (N = 3) | (N = 9) | (N = 49) | (N = 215) | |
Magnetic Field | |||||||||
1.5T | 0 (0%) | 31 (100%) | 0 (0%) | 0 (0%) | 9 (100%) | 0 (0%) | 4 (44.4%) | 0 (0%) | 44 (20.5%) |
3.0T | 5 (100%) | 0 (0%) | 87 (100%) | 22 (100%) | 0 (0%) | 3 (100%) | 5 (55.6%) | 49 (100%) | 171 (79.5%) |
Repetition Time (ms) | |||||||||
Median [Q1, Q3] | 3000 [3000,3000] | 4900 [4400,5600] | 6920 [5580,8380] | 1630 [1390,1680] | 3000 [3000,3000] | 4200 [4200,4200] | 4330 [2300,4800] | 3550 [3550,3550] | 4400 [3550,6490] |
Echo Time (ms) | |||||||||
Median [Q1, Q3] | 52.1 [52.1,52.7] | 58.0 [58.0,58.0] | 54.5 [53.7,54.8] | 73.4 [71.8,74.8] | 65.3 [65.0,65.3] | 48.0 [47.0,48.0] | 56.1 [56.0,69.4] | 54.9 [54.9,56.9] | 54.9 [54.5,58.0] |
Pixel Band width (MHz) | |||||||||
Median [Q1, Q3] | 3710 [3640,3770] | 1460 [1460,1460] | 1950 [1950,1950] | 2340 [2310,2340] | 2700 [2700,2700] | 2330 [2330,2330] | 1950 [1950,1950] | 2550 [2550,2550] | 1950 [1950,2550] |
B value (s/mm2) | |||||||||
Median [Q1, Q3] | 800 [800,800] | 800 [800,800] | 1200 [1200,1200] | 800 [800,800] | 800 [800,800] | 1000 [1000,1000] | 800 [800,800] | 1000 [1000,1000] | 1000 [800,1200] |
FOV (mm) | |||||||||
Median [Q1, Q3] | 375 [370,400] | 400 [400,400] | 360 [360,400] | 350 [350,380] | 375 [375,375] | 380 [380,390] | 380 [380,380] | 399 [399,399] | 399 [360,400] |
Slice Thickness (mm) | |||||||||
Median [Q1, Q3] | 6.00 [5.00,6.00] | 5.00 [5.00,5.00] | 5.50 [5.00,6.00] | 6.00 [6.00,6.00] | 5.50 [5.00,6.00] | 5.50 [5.25,5.75] | 5.00 [5.00,5.00] | 5.00 [5.00,5.00] | 5.00 [5.00,6.00] |
Slice Spacing (mm) | |||||||||
Median [Q1, Q3] | 7.00 [6.00,7.00] | 6.00 [6.00,6.00] | 6.00 [6.00,7.00] | 7.00 [7.00,7.00] | 6.50 [6.00,7.00] | 6.60 [6.30,6.75] | 6.00 [5.50,6.00] | 6.00 [6.00,6.00] | 6.00 [6.00,7.00] |
Pixel Spacing (mm) | |||||||||
Median [Q1, Q3] | 1.93 [1.79,1.93] | 2.33 [2.33,2.33] | 1.41 [1.41,1.56] | 1.22 [1.19,1.22] | 1.95 [1.95,1.95] | 1.42 [1.42,1.46] | 1.48 [1.48,1.48] | 0.780 [0.780,0.781] | 1.41 [1.22,1.70] |