Table 3.
Percent error from measured light dose at the end of treatment with calculated light fluence using the (a) primary component (equation (1)), only the (b) primary component with CF, the (c) primary and scattering component (equation (2)), and the (d) primary and scattering component with CF (equation (3)) The values in the parenthesis are the values for the detector position extrapolated from the method described in section 2.6 since the actual detector positions were not available.
| (a) Primary component only | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Case no. | Diaph | PS | AS | PM | PCW | ACW | Peri | Apex | Avg. |
| 008 | (40.7%) | (41.7%) | (35.1%) | (36.4%) | (29.6%) | (59.8%) | (56.2%) | (32.2%) | 42% ± 11% |
| 012 | 39.8% | 56.4% | 57.2% | 58.5% | 51.0% | 56.6% | 29.2% | 45.8% | 49% ± 10% |
| 014 | 52.9% | 46.9% | 63.9% | 42.4% | 46.5% | 67.6% | 51.8% | 50.0% | 53% ± 9% |
| 016 | 50.0% | 47.4% | 52.4% | 58.3% | 41.2% | 56.5% | (47.1%) | (60.9%) | 52% ± 7% |
| 017 | 39.4% | 49.3% | 63.4% | 44.5% | 28.2% | 39.6% | 29.2% | 45.7% | 42% ± 11% |
| 018 | 43.2% | 52.8% | 62.1% | 52.1% | 45.4% | 63.0% | 58.9% | 61.4% | 55% ± 8% |
| 020 | 52.2% | 63.6% | 58.7% | 59.0% | 53.2% | 58.0% | 60.6% | 67.5% | 59% ± 5% |
| Avg. | 46% ± 6% | 51% ± 7% | 56% ± 10% | 50% ± 9% | 42% ± 10% | 57% ± 9% | 48% ± 13% | 52% ± 12% | |
| (b) Primary and scattering component | |||||||||
| Case no. | Diaph | PS | AS | PM | PCW | ACW | Peri | Apex | Avg. |
| 008 | (10.6%) | (6.4%) | (7.6%) | (5.1%) | (10.4%) | (9.3%) | (6.1%) | (12.9%) | 9% ± 3% |
| 012 | 13.8% | 7.4% | 10.1% | 10.2% | 5.4% | 8.3% | 15.8% | 1.3% | 9% ± 5% |
| 014 | 1.0% | 6.3% | 3.0% | 3.7% | 9.0% | 3.2% | 1.2% | 15.1% | 5% ± 5% |
| 016 | 2.5% | 1.7% | 5.9% | 4.2% | 15.4% | 13.9% | (14.6%) | (9.4%) | 9% ± 6% |
| 017 | 12.9% | 8.7% | 6.7% | 14.9% | 6.6% | 14.7% | 13.7% | 13.1% | 11% ± 4% |
| 018 | 13.6% | 5.7% | 9.0% | 4.2% | 9.2% | 9.4% | 6.5% | 8.9% | 8% ± 3% |
| 020 | 3.1% | 8.3% | 3.5% | 2.5% | 1.6% | 2.4% | 6.1% | 13.1% | 5% ± 4% |
| Avg. | 8% ± 6% | 6% ± 2% | 7% ± 3% | 6% ± 5% | 8% ± 4% | 9% ± 5% | 9% ± 6% | 11% ± 5% | |
| (c) Primary component with dual correction (CF) | |||||||||
| Case no. | Diaph | PS | AS | PM | PCW | ACW | Peri | Apex | Avg. |
| 008 | (20.4%) | (10.4%) | (14.0%) | (12.1%) | (14.8%) | (13.9%) | (14.1%) | (8.1%) | 14% ± 4% |
| 012 | 20.5% | 21.6% | 10.1% | 26.3% | 16.7% | 13.3% | 0.8% | 1.3% | 14% ± 9% |
| 014 | 1.0% | 6.3% | 35.0% | 3.7% | 9.0% | 32.1% | 1.2% | 15.1% | 13% ± 14% |
| 016 | 2.5% | 18.1% | 22.5% | 4.2% | 15.4% | 19.3% | (7.9%) | (10.7%) | 13% ± 7% |
| 017 | 15.2% | 8.3% | 23.5% | 17.6% | 6.6% | 13.5% | 19.7% | 15.0% | 15% ± 6% |
| 018 | 13.6% | 3.8% | 9.0% | 18.6% | 7.2% | 18.6% | 5.6% | 0.4% | 10% ± 7% |
| 020 | 24.3% | 8.9% | 6.4% | 24.3% | 47.1% | 6.9% | 17.3% | 4.4% | 18% ± 14% |
| Avg. | 14% ± 9% | 11% ± 6% | 17% ± 10% | 15% ± 9% | 17% ± 14% | 17% ± 8% | 10% ± 8% | 8% ± 6% | |
| (d) Primary and scattering component with dual correction (CF) | |||||||||
| Case no. | Diaph | PS | AS | PM | PCW | ACW | Peri | Apex | Avg. |
| 008 | (6.6%) | (2.1%) | (2.2%) | (4.5%) | (8.6%) | (6.9%) | (5.4%) | (9.9%) | 6% ± 3% |
| 012 | 8.6% | 1.2% | 4.3% | 5.4% | 5.1% | 5.4% | 10.2% | 2.9% | 5% ± 3% |
| 014 | 4.5% | 9.0% | 7.5% | 7.9% | 3.5% | 4.3% | 5.5% | 9.0% | 6% ± 2% |
| 016 | 1.9% | 2.8% | 5.3% | 3.1% | 9.8% | 8.2% | 6.8% | 9.7% | 6% ± 3% |
| 017 | 8.9% | 3.8% | 1.7% | 8.3% | 4.3% | 11.2% | 9.8% | 3.5% | 7% ± 4% |
| 018 | 4.0% | 2.3% | 8.1% | 0.8% | 3.4% | 7.1% | 11.2% | 6.6% | 5% ± 3% |
| 020 | 6.2% | 4.7% | 1.0% | 6.4% | 12.4% | 2.3% | 1.6% | 0.4% | 5% ± 4% |
| Avg. | 6% ± 3% | 4% ± 3% | 4% ± 3% | 5% ± 3% | 7% ± 4% | 7% ± 3% | 7% ± 3% | 6% ± 4% | |