TABLE VI.
Ring “C”: Median and standard deviation of the three materials scanned using WFBP at decreasing doses. *P value < 0.05—Comparing median SAFIRE value and median WFBP value at the same dose level for the same material.
| Material | WFBP: Ring C—median HU (sd) | |||||
|---|---|---|---|---|---|---|
| Dose (mGy) | 11.94 | 9.01 | 5.97 | 3.04 | 1.58 | 0.76 |
| Acrylic | 119 (10.86) | 120 (11.93) | 121 (13.20) | 120 (19.76) | 120 (25.52) | 121 (38.52) |
| Water | −8 (10.77) | −7 (11.51) | −7 (14.12) | −8 (18.22) | −7 (26.84) | −8 (38.12) |
| 20 lb foam | −702 (8.83) | −701 (9.39) | −701 (13.27) | −702 (16.74) | −702 (25.32) | −701 (36.17) |
| 12 lb foam | −824 (7.78) | −823 (8.20) | −823 (9.86) | −823 (14.15) | −823 (19.77) | −823 28.49) |
| Lung foam | −856 (10.05) | −856 (11.07) | −856 (12.98) | −855 (17.20) | −856 (23.98) | −856 (34.23) |
| 4 lb foam | −937 (8.95) | −937 (10.23) | −937 (11.29) | −937 (17.30) | −937 (21.96) | −937 (33.60)* |
| Internal air | −1000 (7.33) | −1000 (8.57) | −1000 (10.40) | −1000 (12.89)* | −999 (17.05)* | −997 (22.81)* |
| External air | −1002 (8.78) | −1002 (9.31) | −1003 (10.16)* | −1003 (13.89)* | −1002 (17.36) | −999 (22.41)* |