Table 2.
The average density and Sørensen‐Dice similarity coefficient (compared to the reCT) calculated for each insert in the CIRS 062 phantom, and for each image set
| Material | Computed density (g/cm3) | Dice coefficient | |||
|---|---|---|---|---|---|
| [True density (g/cm3)] | DIR | PSC | CBCT | PSC | DIR |
| Exhaled lung (0.52) | 0.53 | 0.52 | 0.47 | 0.98 | 0.96 |
| Adipose (0.93) | 0.93 | 0.90 | 0.87 | 0.99 | 0.94 |
| Liver (1.05) | 1.05 | 1.04 | 1.02 | 0.96 | 0.77 |
| Muscle (1.05) | 1.05 | 1.04 | 1.00 | 0.97 | 0.73 |
| Inhaled lung (0.24) | 0.26 | 0.27 | 0.21 | 0.97 | 0.97 |
| Dense bone (1.55) | 1.55 | 1.58 | 1.57 | 0.86 | 0.80 |
| Breast 50/50 (0.96) | 0.96 | 0.95 | 0.91 | 0.96 | 0.79 |
| Trabecular bone (1.20) | 1.19 | 1.21 | 1.20 | 0.94 | 0.92 |