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Table 4: Subjective assessment of image quality, fat suppression, and susceptibility artifacts^{^a}
Variable Sequence Group P Value^{^b}
Group B (n = 31) Group A (n = 33)
T2WI/STIR images 
    Overall image-quality grade 3.9 ± 0.5 3.6 ± 0.7 .022
    Fat-saturation grade 
        Maxillary region 4.6 ± 0.4 4.3 ± 0.5 .013
        Mandibular region 4.4 ± 0.5 4.0 ± 0.6 .007
        Lower neck region 4.7 ± 0.4 4.3 ± 0.4 .001
    Dental amalgam susceptibility artifacts (%) 38.7% 22.7% .056
Post-Gad-T1WIs 
    Overall image-quality grade 4.0 ± 0.4 2.6 ± 0.6 <.001
    Fat-saturation grade 
        Maxillary region 4.8 ± 0.3 3.8 ± 0.7 <.001
        Mandibular region 4.7 ± 0.3 2.8 ± 0.5 <.001
        Lower neck region 4.8 ± 0.3 1.4 ± 0.7 <.001
    Dental amalgam susceptibility artifacts (%) 37.1% 31.8% .50
↵a Two readers averaged. Values are mean ± SD unless otherwise specified.
↵b Mann-Whitney U test comparing average ratings or permutation test (clustered by patient) for susceptibility artifacts.