Table 5. Interobserver Agreement of Qualitative Analysis (Weighted Kappa).

	< 1 Year	1–6 Years	6–12 Years	> 12 Years
Noise	0.569	0.846	0.673	0.781
Gray matter-white matter differentiation (supratentorial level)	0.684	0.791	0.591	0.660
Gray matter-white matter differentiation (infratentorial level)	0.614	0.673	0.613	0.703
Sharpness	0.644	0.611	0.839	0.638
Artifact	0.521	0.733	0.640	0.825
Acceptability	0.531	0.642	0.768	0.655
Image texture	0.829	0.796	0.681	0.740