Table 3.
Measured Hounsfield units for different tissue types in patient and phantom.
| Area | Patient | PixelPrint Phantom | difference | |||||
|---|---|---|---|---|---|---|---|---|
| mean ± stdev | min | max | mean ± stdev | min | max | |||
| 1 | Bone I | 49.3 ± 31.2 | 3.4 | 175.8 | 57.1 ± 45.5 | −45.0 | 185.3 | +7.8 |
| 2 | Bone II | 363.9 ± 50.9 | 242.2 | 452.1 | 349.2 ± 47.0 | 232.8 | 504.6 | −14.7 |
| 3 | Cortical Bone | 1319.7 ± 87.4 | 1008.9 | 1406.8 | 800.6 ± 14.5 | 760.6 | 837.9 | −519.0 |
| 4 | Soft tissue I | 55.6 ± 8.5 | 36.5 | 76.3 | 53.1 ± 24.1 | 5.4 | 107.3 | −2.5 |
| 5 | Soft tissue II | −78.1 ± 13.5 | −105.9 | −55.8 | −66.2 ± 44.7 | −174.9 | 9.6 | + 11.9 |
All measurements are in HUs. Stdev stands for standard deviation. Patient and phantom images were assumed to be the same z location and registered 2D-wise.