TABLE II.
Values of Equivalent Dose HT, Tissue Weighting Factor wT, and Effective Dose E, from External Neutrons for the Standard Nozzle and the Nozzle with a Modified Field-Defining Collimator and Additional Jaws
| Organ or Tissue | wT | HT (mSv) | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Standard Nozzle | Modified Nozzle | ||||||||
| SPA | IPA | LPO | RPO | SPA | IPA | LPO | RPO | ||
| Gonads | 0.20 | 28.9 | 54.1 | 13.3 | 12.9 | 18.6 | 27.0 | 10.7 | 10.1 |
| Red bone marrow | 0.12 | 49.5 | 66.1 | 22.5 | 21.3 | 28.8 | 32.9 | 19.6 | 17.4 |
| Colon | 0.12 | 80.6 | 166.0 | 27.3 | 23.3 | 41.5 | 76.5 | 24.3 | 19.3 |
| Lungs | 0.12 | 266.5 | 177.3 | 67.0 | 64.2 | 135.0 | 79.0 | 50.9 | 47.3 |
| Stomach | 0.12 | 135.8 | 177.8 | 46.2 | 31.6 | 62.7 | 81.3 | 41.7 | 23.4 |
| Bladder | 0.05 | 40.0 | 88.3 | 13.9 | 14.4 | 26.9 | 42.6 | 11.5 | 11.9 |
| Breasts | 0.05 | 157.1 | 129.2 | 64.2 | 62.1 | 70.6 | 53.4 | 57.6 | 51.0 |
| Liver | 0.05 | 148.1 | 187.1 | 32.3 | 45.9 | 70.0 | 86.5 | 25.3 | 38.5 |
| Esophagus | 0.05 | 248.5 | 137.1 | 104.0 | 87.9 | 132.0 | 61.5 | 77.5 | 64.8 |
| Thyroid | 0.05 | 207.9 | 69.8 | 149.9 | 131.9 | 111.4 | 30.4 | 109.4 | 98.1 |
| Skin | 0.01 | 107.9 | 108.6 | 59.4 | 50.3 | 57.9 | 53.5 | 49.5 | 40.4 |
| Bone surface | 0.01 | 105.4 | 82.5 | 108.2 | 84.0 | 55.5 | 41.1 | 90.8 | 67.6 |
| Remainder | 0.05 | 107.9 | 108.6 | 59.4 | 50.3 | 57.9 | 53.5 | 49.5 | 40.4 |
| E (mSv) | 117.3 | 119.2 | 45.1 | 40.4 | 60.5 | 55.1 | 36.5 | 31.2 | |