TABLE V.
Ring “C”: Median and standard deviation of the three materials scanned using SAFIRE 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 | SAFIRE: Ring C—median HU (sd) | |||||
|---|---|---|---|---|---|---|
| Dose (mGy) | 11.94 | 9.01 | 5.97 | 3.04 | 1.58 | 0.76 |
| Acrylic | 120 (6.60) | 121 (6.89) | 121 (7.32) | 120 (10.11) | 120 (12.60) | 121 (18.47) |
| Water | −8 (6.39) | −7 (6.66) | −6 (7.75) | −8 (9.24) | −7 (13.10) | −8 (18.12) |
| 20 lb foam | −702 (4.15) | −702 (4.38) | −702 (6.12) | −702 (7.69) | −702 (11.70) | −702 (16.71) |
| 12 lb foam | −824 (3.41) | −824 (3.61) | −823 (4.32) | −824 (6.18) | −823 (8.64) | −823 (12.56) |
| Lung foam | −857 (6.61) | −856 (6.84) | −856 (7.54) | −856 (9.07) | −856 (11.87) | −856 (16.31) |
| 4 lb foam | −937 (4.04) | −937 (4.65) | −937 (5.09) | −937 (7.85) | −937 (9.92) | −936 (15.02)* |
| Internal air | −1000 (3.31) | −999 (3.85) | −999 (4.73) | −998 (5.71)* | −997 (7.54)* | −993 (10.05)* |
| External air | −1001 (4.63) | −1001 (4.88) | −1001 (5.31)* | −1000 (7.31)* | −998 (9.15) | −994 (12.20)* |