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Table 2 Comparison of the results of qualitative image quality scores for the three sequences

From: Feasibility study of simultaneous multislice diffusion kurtosis imaging with different acceleration factors in the liver

Criteria C-DWI SMS2-DWI SMS3-DWI P values P values P values P values
C vs. SMS2 SMS2 vs. SMS3 C vs. SMS3
Sharpness of the right lobe        
b = 800 4.88 ± 0.40 4.84 ± 0.46 4.64 ± 0.60 < 0.001 1.000 0.144 0.066
b = 2000 4.16 ± 0.99 4.10 ± 1.00 3.74 ± 1.03 < 0.001 1.000 0.002 0.001
Conspicuity of the left lobe        
b = 800 4.63 ± 0.67 4.56 ± 0.71 4.40 ± 0.77 0.001 1.000 0.370 0.131
b = 2000 3.64 ± 1.13 3.45 ± 1.18 3.14 ± 1.05 < 0.001 0.268 0.008 < 0.001
Visibility of intrahepatic vessels        
b = 800 4.93 ± 0.26 4.70 ± 0.54 4.46 ± 0.71 < 0.001 0.190 0.109 < 0.001
b = 2000 3.88 ± 1.04 3.68 ± 1.11 3.20 ± 1.14 < 0.001 0.246 < 0.001 < 0.001
Artefacts        
b = 800 4.95 ± 0.22 4.69 ± 0.52 4.06 ± 0.75 < 0.001 0.207 < 0.001 < 0.001
b = 2000 4.70 ± 0.62 4.53 ± 0.64 3.49 ± 0.73 < 0.001 0.537 < 0.001 < 0.001
Overall image quality        
b = 800 4.80 ± 0.40 4.70 ± 0.49 4.13 ± 0.75 < 0.001 1.000 < 0.001 < 0.001
b = 2000 4.13 ± 0.82 4.05 ± 0.87 3.40 ± 0.69 < 0.001 1.000 < 0.001 < 0.001
  1. Means and standard deviations of image quality obtained by two radiologists are summarized. b800, b = 800 s/mm2; b2000, b = 2000 s/mm2; C-DWI, conventional diffusion-weighted imaging; SMS2-DWI, simultaneous multislice accelerated DWI with an acceleration factor of 2; SMS3-DWI, simultaneous multislice accelerated DWI with an acceleration factor of 3