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Effective flux rate ratio of the X-ACT transmission source to that of Gd-153 transmission sources when passing through different thicknesses of water, starting with a ratio of 80 at 0 cm. The x-ray tube is operated at 160 kVp and 2.0 mA
| Water (cm) | 0 | 10 | 20 | 30 | 40 | 50 | 60 |
|---|---|---|---|---|---|---|---|
| Ratio | 80 | 69 | 59 | 51 | 43 | 37 | 32 |
