Table 1. Mean elastic modulus, long term shear modulus, and time constant data, including standard deviation of the mean, for each type of TMP: PVA, gelatin, and agar.
| Phantom Type | Elastic Modulus (kPa) | Mean (kPa) | Standard Deviation | Long term Shear Modulus (MPa sec) | Mean (MPa sec) | Standard Deviation | Time Constant (sec) | ||
|---|---|---|---|---|---|---|---|---|---|
| 600 μm | 800 μm | 600 μm | 800 μm | ||||||
| 14% PVA | 5.722 | 5.598 | 5.660 | 0.158 | 1.105 | 0.883 | 0.994 | 0.040 | 175.657 |
| 17% PVA | 9.552 | 9.319 | 9.435 | 0.200 | 1.785 | 1.467 | 1.626 | 0.075 | 172.330 |
| 20% PVA | 33.563 | 33.866 | 33.715 | 1.015 | 4.693 | 3.824 | 4.259 | 0.273 | 126.317 |
| 10% Gelatin | 15.823 | 16.873 | 16.348 | 0.897 | 2.830 | 2.710 | 2.770 | 0.128 | 169.424 |
| 15% Gelatin | 43.518 | 46.903 | 45.210 | 2.243 | 6.390 | 6.358 | 6.374 | 0.309 | 140.988 |
| 20% Gelatin | 62.010 | 69.907 | 65.959 | 3.087 | 8.649 | 8.957 | 8.803 | 0.445 | 133.458 |
| 2% Agar | 106.497 | 102.778 | 104.638 | 3.911 | 5.595 | 6.000 | 5.797 | 0.210 | 55.405 |
| 2.5% Agar | 137.034 | 133.918 | 135.476 | 4.647 | 9.122 | 10.045 | 9.583 | 0.607 | 70.737 |
| 3% Agar | 199.049 | 191.284 | 195.166 | 4.281 | 13.575 | 14.913 | 14.244 | 0.840 | 72.984 |