Table 2 Tolerance ranges calculated for all the monitored QC parameters for the Quantum GX micro-CT (PerkinElmer, Inc. Waltham, MA).

From: The importance of routine quality control for reproducible pulmonary measurements by in vivo micro-CT

QC parameter

Tolerance range (BL ± tolerance width)

Water (grey level)

2000 ± 17

Air (grey level)

449 ± 33

Noise (grey level)

124 ± 2

Uniformity (grey level)

− 41 ± 22

Contrast Resolution (%)

− 9%: − 8 ± 3

− 6%: − 3 ± 1

− 3%: 1 ± 1

MTF (%) for spatial resolution

3.3 lp/mm: 49 ± 19

5 lp/mm: 42 ± 17

10 lp/mm: 24 ± 14