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Table 1
Mass density, electron density and the calculated CT numbers of tissue equivalent materials (for tissue substitute method) at tube voltage of 120 kVp of Siemens SOMATOM sensation 64-slice scanner.
| Tissue equivalent material | ρ(g/cm3) | ρe(e–/g) | CT number |
|---|---|---|---|
| A-150 | 1.12 | 1.11 | 96.09 |
| Acrylic | 1.17 | 1.14 | 119.76 |
| Alderson–lung | 0.32 | 0.30 | −692.86 |
| Alderson–muscle A | 1.00 | 0.98 | −25.90 |
| Alderson–muscle B | 1.00 | 0.98 | −18.95 |
| AP6 | 0.91 | 0.88 | −129.63 |
| AP/L2 | 0.92 | 0.93 | −80.58 |
| AP/SF1 | 0.92 | 0.93 | −92.98 |
| B-100 | 1.45 | 1.38 | 534.54 |
| B-110 | 1.79 | 1.65 | 956.25 |
| BR12 | 0.97 | 0.95 | −78.18 |
| Ethoxyethanol | 0.93 | 0.93 | −84.87 |
| EVA-28 | 0.95 | 0.96 | −63.93 |
| Frigerio gel | 1.12 | 1.11 | 106.00 |
| Frigerio liquid | 1.08 | 1.07 | 71.44 |
| Glycerol trioleate | 0.92 | 0.92 | −97.07 |
| Goodman liquid | 1.07 | 1.06 | 57.23 |
| Griffith breast | 1.10 | 1.08 | 69.25 |
| Griffith lung | 0.26 | 0.25 | −747.19 |
| Griffith muscle | 1.12 | 1.10 | 91.62 |
| M3 | 1.05 | 1.05 | 46.26 |
| Magnesium | 1.74 | 1.55 | 751.25 |
| Melinex | 1.40 | 1.31 | 297.40 |
| Polyamide | 1.13 | 1.11 | 93.72 |
| Paraffin wax | 0.93 | 0.96 | −66.24 |
| Plaster of Paris | 2.32 | 2.13 | 1641.20 |
| Polyethylene | 0.92 | 0.95 | −80.75 |
| Polystyrene | 1.05 | 1.02 | −7.76 |
| Polytetrafluoroethylene | 2.10 | 1.82 | 855.18 |
| Polyvinyl chloride | 1.35 | 1.24 | 516.41 |
| RF-1 | 0.93 | 0.95 | −68.63 |
| Rice powder | 0.84 | 0.81 | −203.89 |
| RM-1 | 1.03 | 1.04 | 34.42 |
| RM/G1 | 1.07 | 1.06 | 60.79 |
| RM/L3 | 1.04 | 1.03 | 30.33 |
| RM/SR4 | 1.03 | 1.02 | 0.19 |
| Rossi gel | 1.10 | 1.09 | 82.22 |
| Rossi liquid | 1.11 | 1.10 | 92.09 |
| RW-1 | 0.90 | 0.99 | −20.27 |
| SB5 | 1.87 | 1.77 | 1152.27 |
| White liquid | 1.72 | 1.60 | 913.45 |
| WT1 | 1.02 | 0.99 | −10.11 |
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