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Comparison between measured and calculated (Schneider method) CT numbers for the different materials in the Catphan® 500 phantom.
| Material | # CT measured | # CT calculated |
|---|---|---|
| Air | −971.85 | −1000.0 |
| PMP | −181.59 | −186.1 |
| LDPE | −93.86 | −102.1 |
| Polystryrene | −38.25 | −24.3 |
| Acrilyc | 119 | 118.3 |
| Delrin | 338.29 | 340.3 |
| Teflon | 928.4 | 937.4 |
