Table 3.

Summary of the results of the qualitative analysis. N (%) indicates the number of segments with the rating 5 (best) for each parameter. Mixed GLM refers to mixed general linear model. P-values in bold letters indicate statistical significances.

Vessel Contrast = 5
	N (%)	Mixed GLM P	Contrasts	Adjusted P
FE4	107 (81.1%)	0.011	FE4 vs FE2	1
FE2	98 (74.2%)		FE4 vs GD	1
GD – Diluted (GD)	104 (78.8%)		FE4 vs GU	0.006
GD – Undiluted (GU)	88 (66.7%)		FE2 vs GD	1
			FE2 vs GU	1
			GD vs GU	0.363
Artifacts = 5
	N (%)	Mixed GLM P	Contrasts	P-value
FE4	119 (90.2%)	0.009	FE4 vs FH	0.841
FE2	124 (93.9%)		FE4 vs GD	1
GD – Diluted (GD)	120 (90.9%)		FE4 vs GU	0.841
GD – Undiluted (GU)	114 (86.4%)		FE2 vs GD	1
			FE2 vs GU	0.010
			GD vs GU	1
Image Quality = 5
	N (%)	Mixed GLM P	Contrasts	P-value
FE4	103 (78.0%)	0.008	FE4 vs FE2	1
FE2	96 (72.7%)		FE4 vs GD	1
GD – Diluted (GD)	104 (78.8%)		FE4 vs GU	0.010
GD – Undiluted (GU)	71 (53.8%)		FE2 vs GD	1
			FE2 vs GU	0.647
			GD vs GU	0.013