Table 4 Results of the difference in overall image quality for the subjective image quality assessment.

From: Assessment of image quality and impact of deep learning-based software in non-contrast head CT scans

Site

Method

Rater 1

Rater 2

Rater 3

Rater 4

W

p

Site I

FBP vs. FBP + PS

-0.33

0

− 0.02

− 0.54

0.44

 < 0.001

FBP + PS vs. I3

0.04

0

0

− 0.46

0.34

0.01

I3 + PS vs. I3

0.08

0

0

− 0.23

0.41

 < 0.001

Site II

FBP vs. FBP + PS

− 0.04

0

0

− 0.11

0.30

0.07

FBP + PS vs. I3

0.74

0

0

− 0.81

0.21

0.89

I3 + PS vs. I3

0.02

0

0

0.02

0.36

 < 0.001

Site III

FBP vs. FBP + PS

− 0.20

0

0

− 0.22

0.43

 < 0.001

  1. Positive values for the raters indicate that the images of the first method were rated higher. W indicates the concordance of the ratings calculated by Kendall’s W. A p-value less than 0.05 indicates agreement and is shown in bold.
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