Table 2. Probabilities of anatomic structures along the optic pathway for being the origin of radiation induced visual sensations.
| VOI | Number of beams | Beams inducing visual sensations | ||||||
|---|---|---|---|---|---|---|---|---|
| Average | Sigma | Min | Max | Average [%] | Sigma | Min | Max | |
| EB | 110.6 | 39.5 | 24 | 208 | 10.1 | 5.1 | 1 | 26 |
| ON (intra) | 168.5 | 40 | 85 | 277 | 15.4 | 4.1 | 6 | 25 |
| ON (retro)CH, OT | 344.5 | 66.7 | 199 | 542 | 22.3 | 1.9 | 14 | 27 |
| Brodman areas | ||||||||
| A17 | 419.3 | 63.3 | 282 | 611 | 14.8 | 2.1 | 6 | 20 |
| A18 | 390.5 | 55.1 | 222 | 577 | 12.6 | 3.6 | 1 | 22 |
| A19 | 398.2 | 55.3 | 219 | 590 | 11.2 | 5.2 | 1 | 21 |
| A20 | 400.5 | 86.1 | 158 | 606 | 17.5 | 1.8 | 11 | 23 |
| A21 | 476.4 | 54.7 | 260 | 609 | 17.7 | 2.6 | 6 | 25 |
| A37 | 420.1 | 66.4 | 207 | 609 | 16.1 | 2 | 7 | 22 |
Volume of interest (VOI), including the eyeballs (EB), optic nerve intraorbital (ON intra), optic nerve retroorbital (ON retro), chiasma (CH), optic tract (OT) and Brodman Areas A17, A18, A19, A20, A21 and A37, showing different probability for being the origin of the visual sensations based on the frequency of light perception, when they are hit by a beam. Interestingly the probability increases in retroorbital structures, especially optic chiasm, optic tract and in the brodman areas 20, 21, 37. The eye balls showed lowest probability of all VOIs.