Table 4. Average values for Planmeca ProMax 3D.
Material | Original grey level | Calculated HU | Actual HU | Percentage difference |
Aluminium | 1384.5 | 2227.8 | 2212.7 | 0.76 |
Outer bone equivalent | 825.4 | 1459.7 | 1428.0 | 1.61 |
Inner bone equivalent | 35.3 | 247.3 | 246.8 | 1.83 |
PMMA | −81.0 | 87.4 | 115.6 | 1.41 |
Water equivalent | −101.1 | 56.2 | 17.0 | 2.62 |
PMMA, polymethlymethacrylate.
Mean keV, 73.4; Planmeca ProMax 3D, Planmeca, Helsinki, Finland.