TABLE 4

Observer Scores of Preference in Paired Scans with Statistical Significance

Patient no.	2D 2 min vs. 2D 4 min	2D 2 min vs. 2D 3 min	2D 3 min vs. 2D 4 min	3D 2 min vs. 3D 4 min	3D 2 min vs. 3D 3 min	3D 3 min vs. 3D 4 min	2D 2 min vs. 3D 2 min	2D 3 min vs. 3D 3 min	2D 4 min vs. 3D 4 min
1	−1	0	−1	+2	+1	+1	0	+1	+2
2	−1	0	+1	−1	0	−1	−1	+2	−1
3	0	0	0	−1	0	+1	0	+2	+1
4	+1	+1	−1	+1	+1	0	+2	+2	+1
5	−1	0	0	+2	−1	0	+1	+2	+2
6	−1	−1	0	+1	−1	−1	+1	+1	+1
7	+2	+1	0	−2	+1	−1	−1	+2	+1
8	+1	−1	−1	−1	−1	+1	+1	+1	+1
9	−2	−1	0	0	0	0	0	+2	+2
10	+2	+2	+1	+2	+1	+1	−2	+1	+2
11	0	+1	−1	−1	0	0	+1	+1	+2
12	0	−2	+1	0	0	+1	−1	+1	+1
13	+2	+1	+2	+1	+1	+1	0	+1	+1
14	0	0	0	0	0	0	0	0	0
Mean	0.14	0.07	0.07	0.21	0.14	0.21	0.07	1.36	1.14
SE	0.35	0.29	0.25	0.35	0.21	0.21	0.29	0.17	0.23
95% CI	−0.60 to −0.89	−0.55 to −0.69	−0.46 to −0.60	−0.54 to −0.97	−0.30 to −0.59	−0.25 to −0.68	−0.55 to −0.69	0.99 to −1.72	0.64 to −1.64
P	0.34	0.4	0.39	0.28	0.25	0.17	0.4	0.0001	0.0001
Scan choice	Non	Non	Non	Non	Non	Non	Non	3D	3D

Non = No significant preference between scans was observed.
Score of 0 suggested no preference; score of +1 implied second scan was superior, whereas −1 signified that first scan was superior. Similarly, score of ±2 indicated one scan, compared with other, was far superior.