Table 4. Anterior and lateral attenuation correction factors (ACF) after pulsating aerosol (PA) delivery in healthy volunteers and in CRS patients before and after sinus surgery (FESS) as well as in healthy volunteers after nasal spray application (Healthy-NS).
| Anterior ACFA | Lateral ACFL | |
|---|---|---|
| Healthy-PA | ||
| Mean +/- SD | 1.45+/-0.18 | 1.77+/-0.31++ |
| Median (min, max) | 1.54 (1.07, 1.64) | 1.82 (1.25, 2.21) |
| Healthy-NS | ||
| Mean +/- SD | 1.18+/-0.11** | 1.37+/-0.19**,++ |
| Median (min, max) | 1.17 (1.06, 1.36) | 1.35 (1.12, 1.75) |
| CRS-PA before FESS | ||
| Mean +/- SD | 1.64+/-0.23 | 1.91+/-0.28++ |
| Median (min, max) | 1.53 (1.30, 2.14) | 1.83 (1.51, 2.36) |
| CRS-PA after FESS | ||
| Mean +/- SD | 1.56+/-0.23 | 1.82+/-0.27++ |
| Median (min, max) | 1.57 (1.22, 2.06) | 1.82 (1.44, 2.29) |
** p < 0.01 compared to Healthy-PA, ++ p < 0.01 lateral versus anterior imaging.