Table 3 Image quality analysis.

From: Influence of helical pitch and gantry rotation time on image quality and file size in ultrahigh-resolution photon-counting detector CT

Parameter

P1

P2

P3

P4

P5

P6

P7

P8

P9

Median subjective image quality

5 (4–5)

5 (4–6)

3 (3–4)

5 (4–6)

5 (4–6)

5 (4–6)

5 (4–6)

5 (4–6)

5 (4–6)

Mean image noise [HU]

119.8 ± 13.1

145.9 ± 22.4

159.1 ± 16.6

104.1 ± 16.5

134.2 ± 19.3

154.4 ± 22.4

85.1 ± 10.4

120.0 ± 18.5

128.2 ± 17.4

  1. P1–9 scan protocol 1–9.