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                    [urn:ac.highwire.org:guest:privilege] => Array
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TABLE 3: Summary of quality scores for images produced with CTA and DSCTA
Test Operator 1 (n = 30) Operator 2 (n = 30)
Mean Median SD Mean Median SD
CTA 2.50 3 0.86 2.67 3 0.80
Hard-copy check by operator 3 3.07 3 1.17 2.83 3 1.09
DSCTA 3.37 3 0.81 3.30 3 0.95
Hard copy check by operator 3 3.97 4 0.85 3.83 4 0.95
DSCTA minus CTA^* 0.87 1 0.73 0.63 1 0.56
Hard-copy check by Observer 3^† 0.90 1 1.03 1.00 1 1.11
* 95% CIs were 0.59, 1.14 for operator 1 and 0.43, 0.84 for operator 2. P values with the t test were <.001 for both operators.
† 95% CIs were 0.52, 1.25 for operator 1 and 0.58, 1.42 for operator 2. P values with the t test were <.001 for both operators.

Test	Operator 1 (n = 30)			Operator 2 (n = 30)
Test	Mean	Median	SD	Mean	Median	SD
CTA	2.50	3	0.86	2.67	3	0.80
Hard-copy check by operator 3	3.07	3	1.17	2.83	3	1.09
DSCTA	3.37	3	0.81	3.30	3	0.95
Hard copy check by operator 3	3.97	4	0.85	3.83	4	0.95
DSCTA minus CTA^*	0.87	1	0.73	0.63	1	0.56
Hard-copy check by Observer 3^†	0.90	1	1.03	1.00	1	1.11