Table 1.
Nominal densities and CT numbers of gammex rod materials
| Rod materials | Electron density relative to water | Physical density (g/cm3) | CT Sim average CT value (HU) | AIRO average CT value (HU) | Relative stopping power (Clinical CT Sim) |
|---|---|---|---|---|---|
| LN‐300 Lung | 0.28 | 0.30 | 297.36 | 315.32 | 0.28 |
| LN‐450 Lung | 0.40 | 0.41 | 450.71 | 464.75 | 0.44 |
| Adipose | 0.90 | 0.92 | 905.69 | 902.46 | 0.95 |
| Breast | 0.96 | 0.98 | 956.58 | 947.48 | 0.98 |
| CT solid water | 0.99 | 1.02 | 996.92 | 992.79 | 1.01 |
| Brain | 1.05 | 1.05 | 1020.03 | 1004.92 | 1.03 |
| Liver | 1.07 | 1.11 | 1070.89 | 1051.02 | 1.07 |
| Inner bone | 1.09 | 1.14 | 1210.49 | 1209.70 | 1.13 |
| B200 bone material | 1.11 | 1.16 | 1221.89 | 1214.12 | 1.13 |
| CB2–30% CaCO3 | 1.28 | 1.34 | 1439.98 | 1423.25 | 1.24 |
| CB2–50% CaCO3 | 1.47 | 1.56 | 1799.79 | 1791.62 | 1.43 |
| Cortical bone | 1.69 | 1.82 | 2187.78 | 2181.50 | 1.65 |