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CT calibration data
| Baseline | Follow-up | Change from baseline | |
| Internal air calibration (n = 68) | -998.7 ± 0.9 | -997.5 ± 1.9 | 1.2 ± 5.5 |
| LN300 electron density rod (n = 32) | -717.5 ± 2.4 | -716.4 ± 3.2 | 1.1 ± 3.0 |
| LN450 electron density rod (n = 32) | -552.4 ± 2.6 | -551.6 ± 2.8 | 0.8 ± 3.4 |
| 'Solid' water electron density rod (n = 32) | -7.8 ± 3.5 | -9.7 ± 3.6 | 1.9 ± 2.7 |
All values are presented as the mean ± standard deviation in Hounsfield Units (HU).
