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Table 4 Subjective and objective evaluation of image quality with prospective ECG-triggering DSCT (Group A) and non-ECG-gated DSCT (Group B)

From: Image quality and radiation dose of dual-source CT cardiac angiography using prospective ECG-triggering technique in pediatric patients with congenital heart disease

 

Group A

Group B

P value

Subjective image quality scores

4.4 ± 0.1

3.8 ± 0.3

0.007

Attenuation in the left atrium (HU)

409.2 ± 85.5

226.4 ± 141.6

0.003

Noise in the left atrium (HU)

40.0 ± 15.8

18.46 ± 5.6

0.004

SNR in the left atrium

11.7 ± 4.6

13.2 ± 8.9

0.638

  1. SNR, signal to noise ratio