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Table 2 Summary of scores from the reader study by frame rate reduction

From: Synthetic interpolated DSA for radiation exposure reduction via gamma variate contrast flow modeling: a retrospective cohort study

FRR percentage and readers

Number of graded studies

Score

Mean (SD)

Range

95% CI

75% FRR

 Reader 1

48

11.5 (3.6)

5.0–18.0

10.5, 12.5

 Reader 2

48

12.9 (2.7)

6.3–19.0

12.1, 13.7

 Reader 3

48

13.9 (2.2)

8.0–18.0

13.2, 14.5

 Total

144

12.8 (3.0)

5.0–19.0

12.3, 13.3

66% FRR

 Reader 1

48

11.9 (3.9)

5.0–19.0

10.8, 13.1

 Reader 2

48

12.2 (2.6)

6.3–19.3

11.5, 13.0

 Reader 3

48

13.9 (2.2)

7.3–17.7

13.3, 14.5

 Total

144

12.7 (3.1)

5.0–19.3

12.2, 13.2

50% FRR

 Reader 1

48

11.2 (3.5)

5.0–19.0

10.2, 12.2

 Reader 2

48

11.4 (2.6)

6.0–18.7

10.6, 12.1

 Reader 3

48

13.5 (2.0)

10.0–17.0

12.9, 14.0

 Total

144

12.0 (2.9)

5.0–19.0

11.5, 12.5

  1. Each synthetic DSA directly compared to the original DSA using the criteria shown in Table 1. CI Confidence interval, DSA Digital subtraction angiography, FRR Frame rate reduction, SD Standard deviation