Summary
In this document, you will find the different thresholds for plan study score in terms of "points" achieved for ProKnow Achievement System (PAS). These will be updated after each plan study is closed and the specific thresholds are derived based on the study participation and population statistics.
Points System
The conventional point system for an international, public plan study is based on three ways to achieve points:
- Performance Points
- Statistical Excellence Points
- Continual Improvement Points
Performance Points
These are awarded based on your plan submission during the data collection phase.
| Criteria | Points Awarded |
| Score ≥ TH3 | 8 Points |
| TH3 > Score ≥ TH2 | 4 Points |
| TH2 > Score ≥ TH1 | 2 Points |
| Score < TH1 | 1 Point |
Statistical Excellence Points
These are awarded based on your plan submission during the data collection phase.
| Criteria | Points Awarded |
| Score ≥ POP10 | 2 Points (Extra) |
| POP10 > Score ≥ POP20 | 1 Point (Extra) |
Continual Improvement Points
These are awarded based on plans scored after the data collection phase.
| Criteria | Points Awarded |
| High Score ≥ TH3 and you did not already achieve TH3 with your initial submission | 2 Points |
| High Score ≥ TH2 and you did not already achieve TH2 with your initial submission | 1 Point |
Per Study Point Thresholds
The following point thresholds are in chronological order of the public plan studies.
2016 AAMD/RSS: SBRT Prostate
| Threshold | Value | Derivation |
| TH1 | 129.9 | Population mean minus one standard deviation (approx.) |
| TH2 | 138.1 | Population mean |
| TH3 | 142.6 | Top 30% in population |
| Top 20% | 143.6 | Top 20% in population |
| Top 10% | 145.0 | Top 10% in population |
2017 QADS: TG244 Head and Neck
| Threshold | Value | Derivation |
| TH1 | 117.9 | Population mean minus one standard deviation (approx.) |
| TH2 | 130.6 | Population mean |
| TH3 | 139.6 | Top 30% in population |
| Top 20% | 141.5 | Top 20% in population |
| Top 10% | 143.6 | Top 10% in population |
2017 TROG: SBRT Spine
| Threshold | Value | Derivation |
| TH1 | 130.0 | First quality threshold; slightly more lenient than mean minus standard deviation |
| TH2 | 140.1 | Population mean |
| TH3 | 145.2 | Top 30% in population |
| Top 20% | 146.3 | Top 20% in population |
| Top 10% | 147.0 | Top 10% in population |
2017 AAMD: Skin Cancer
| Threshold | Value | Derivation |
| TH1 | N/A | Contributed a solution to the study. |
| TH3 | 18 | Solutions meeting all minimum requirements. |
2017 Proton: Craniopharyngioma
| Threshold | Value | Derivation |
| TH1 | N/A | Contributed to proton plan study |
| TH3 | 111 | Proton plan meeting all base requirements |
2017 RSS: SBRT Lung
| Threshold | Value | Derivation |
| TH1 | 104 | Accomplishment level 1 |
| TH2 | 123 | Accomplishment level 2 (population mean) |
| TH3 | 130 | Accomplishment level 3 |
| Top 20% | 132.3 | Top 20% in population |
| Top 10% | 134.9 | Top 10% in population |
2018 World Championships
| Threshold | Value | Derivation |
| TH1 | 103 | Accomplishment level 1 |
| TH2 | 119 | Accomplishment level 2 (population mean) |
| TH3 | 130 | Accomplishment level 3 |
| Top 20% | 132 | Top 20% in population |
| Top 10% | 135 | Top 10% in population |
2018 TROG: SRS Brain
Special Note: A few of the high scoring plans submitted to this study were of questionable practicality, evidenced by potentially unrealistic/high MU and number of treatment beams (IMRT or arc). Remember, the cardinal rule of plan studies is to only submit plans that you would deliver to a real patient. All submitted plans are included in the statistical analysis and population results, but individual high performers (announced at the TROG meeting, and listed elsewhere, on the "News" feed) may have some plans filtered out.
| Threshold | Value | Derivation |
| TH1 | 108 | Population mean minus one standard deviation |
| TH2 | 123 | Population mean |
| TH3 | 135 | Top 30% in population |
| Top 20% | 139 | Top 20% in population |
| Top 10% | 142 | Top 10% in population |
2019 TROG: SBRT Pancreas
| Threshold | Value | Derivation |
| TH1 | 123 | Population mean minus one standard deviation |
| TH2 | 131 | Population mean |
| TH3 | 137 | Top 30% in population |
| Top 20% | 139 | Top 20% in population |
| Top 10% | 140.8 | Top 10% in population |
2019 RSS: SBRT Pancreas
| Threshold | Value | Derivation |
| TH1 | 136 | Population mean minus one standard deviation (relaxed to next lowest whole number point) |
| TH2 | 142 | Population mean (relaxed to next lowest half point) |
| TH3 | 145 | Top 30% in population (relaxed to next lowest half point) |
| Top 20% | 146 | Top 20% in population (relaxed to next lowest half point) |
| Top 10% | 146.5 | Top 10% in population (relaxed to next lowest half point) |
2020 TROG: SBRT Liver
| Threshold | Value | Derivation |
| TH1 | 97 | Population mean minus one standard deviation |
| TH2 | 129 | Population mean (relaxed to next lowest integer) |
| TH3 | 142 | Top 30% in population (relaxed to next lowest integer) |
| Top 20% | 145 | Top 20% in population (relaxed to next lowest integer) |
| Top 10% | 147 | Top 10% in population (relaxed to next lowest integer) |
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