Table 2. Visualization scores.
| Area | Comparison between methods | Comparison between readers | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| CT1 | MR3 | p | CT1 | MR4 | p | CT2 | MR3 | p | CT2 | MR4 | p | CT1 | CT2 | p | MR3 | MR4 | p | |
| A | 5.48 | 5.78 | .014 | 5.48 | 5.73 | .012 | 5.88 | 5.78 | .046 | 5.88 | 5.73 | .014 | 5.48 | 5.88 | <.0001 | 5.78 | 5.73 | .527 |
| B | 5.55 | 5.68 | .225 | 5.55 | 5.73 | .071 | 5.88 | 5.68 | .005 | 5.88 | 5.73 | .014 | 5.55 | 5.88 | .001 | 5.68 | 5.73 | .593 |
| C | 5.63 | 5.82 | .052 | 5.63 | 5.73 | .206 | 5.75 | 5.82 | .317 | 5.75 | 5.73 | .705 | 5.63 | 5.75 | .025 | 5.82 | 5.73 | .157 |
| D | 5.08 | 5.88 | <.0001 | 5.08 | 5.75 | .001 | 5.5 | 5.88 | .066 | 5.5 | 5.75 | .254 | 5.08 | 5.5 | <.0001 | 5.88 | 5.75 | .025 |
| E | 5.05 | 5.88 | <.0001 | 5.05 | 5.75 | <.0001 | 5.28 | 5.88 | .011 | 5.28 | 5.75 | .035 | 5.05 | 5.28 | .019 | 5.88 | 5.75 | .025 |
| F | 4.48 | 5.85 | <.0001 | 4.48 | 5.78 | <.0001 | 5.3 | 5.85 | .001 | 5.3 | 5.78 | .003 | 4.48 | 5.3 | <.0001 | 5.85 | 5.78 | 0.18 |
Mean visualization scores of the upper urinary tract (UUT) as evaluated by four observers and their significance values in the comparison of the performance of computed CT urography and MR urography (whole examination at different time intervals jointly analyzed). Opacification at CT urography and diagnostic visualization at MR urography were scored into 6 categories: Score 1 = 0% visualization; 2 = 1–25%; 3 = 26–50%; 4 = 51–75%; 5 = 76–99% and 6 = 100% for each anatomical area (A-F) separately.
Areas: A = Upper cavities; B = Middle and Lower cavities; C = Renal pelvis; D = Ureter, proximal third; E = Ureter, middle third; F = Ureter, lower third. CT1 = CT first observer; CT2: CT second observer; MR3: MR third observer; MR4: MR fourth observer