Skip to main content
Account

Table 2 Quantitative analysis of image quality

From: Double low protocol in pediatric abdominal CT for evaluating right lower quadrant pain

 

Group A

(double low protocol, n = 62)

Group B

(conventional protocol, n = 59)

p

Liver

   

Mean attenuation

132.6 ± 23.6

130.8 ± 27.8

0.698

Noise

13.7 ± 5.9

9.8 ± 2.4

 < 0.001

CNR

5.9 ± 3.2

6.7 ± 2.7

0.170

SNR

11.6 ± 5.2

14.1 ± 4.4

0.004

Pancreas

   

Mean attenuation

123.3 ± 19.9

119.0 ± 16.1

0.197

Noise

15.3 ± 6.8

9.8 ± 2.5

 < 0.001

CNR

4.4 ± 2.6

5.1 ± 2.0

0.102

SNR

9.5 ± 4.1

12.8 ± 3.6

 < 0.001

Renal cortex

   

Mean attenuation

229.9 ± 45.1

215.5 ± 36.3

0.056

Noise

13.3 ± 5.9

9.4 ± 2.9

 < 0.001

CNR

6.2 ± 2.1

9.4 ± 4.3

 < 0.001

SNR

20.5 ± 9.4

25.1 ± 8.7

0.007

Aorta

   

Mean attenuation

221.6 ± 45.0

195.1 ± 33.2

 < 0.001

Noise

15.7 ± 8.5

11.6 ± 4.2

0.001

CNR

12.5 ± 7.6

12.0 ± 5.9

0.637

SNR

17.9 ± 9.9

18.9 ± 7.9

0.557

SNR signal-to-noise ratio, CNR contrast-to-noise ratio