Higher field reduced FOV diffusion-weighted imaging for abdominal imaging at 5.0 Tesla: image quality evaluation compared with 3.0 Tesla

Insights into Imaging

Table 2 Interobserver agreement of image quality assessment from two observers

		FB_3.0 T	NT_3.0 T	RT_3.0 T	FB_5.0 T	NT_5.0 T	RT_5.0 T
Sharpness	ICC	0.925	0.822	0.943	0.756	0.772	0.904
	Lower bound of 95% CI	0.776	0.470	0.830	0.272	0.321	0.714
	Upper bound of 95% CI	0.975	0.940	0.981	0.918	0.923	0.968
Distortion	ICC	0.889	0.918	0.750	0.928	0.822	0.750
	Lower bound of 95% CI	0.669	0.755	0.255	0.785	0.470	0.255
	Upper bound of 95% CI	0.963	0.972	0.916	0.976	0.940	0.916
Artifact	ICC	0.974	0.980	0.936	0.866	0.920	0.945
	Lower bound of 95% CI	0.922	0.941	0.810	0.601	0.760	0.836
	Upper bound of 95% CI	0.991	0.993	0.979	0.955	0.973	0.981
Overall IQ	ICC	0.966	0.932	0.955	0.911	0.836	0.955
	Lower bound of 95% CI	0.899	0.798	0.867	0.734	0.510	0.866
	Upper bound of 95% CI	0.989	0.977	0.985	0.970	0.945	0.985

FB_{3.0 T}, 3.0 T-free-breathing-DWI; NT_{3.0 T}, 3.0 T-navigator-triggered-DWI; RT_{3.0 T}, 3.0 T-respiratory-triggered-DWI; FB_{5.0 T}, 5.0 T-free-breathing-DWI; NT_{5.0 T}, 5.0 T-navigator-triggered-DWI; RT_{5.0 T}, 5.0 T-respiratory-triggered-DWI; Overall IQ, overall image quality; CI, confidence of interval