PS1 - 183 Recommendations for the Referral of Patients from Proton Beam Therapy, an Alberta Health Services Report: A Model for Canada?
Bibliographic record
Abstract
Proton beam therapy (PBT) offers compelling advantages in physical dose distribution compared to photon therapy. There are increasing numbers of gantry-based proton facilities worldwide but no such facilities exist in Canada. To access PBT, Canadian patients must travel abroad for treatment at high cost. In the face of limited access, this report seeks to provide recommendations for the selection of patients most likely to benefit from PBT and suggests an out-of-country referral process. METHODS: A systematic literature search for studies between January 1990 and May 2014 evaluating clinical outcomes after PBT. A draft report was developed through review of evidence, externally reviewed, and approved by the Alberta Health Services Cancer Care Proton Therapy Guidelines steering committee. RESULTS: Proton therapy is often used to treat tumours close to radiosensitive tissues, and children at risk of developing significant late effects of radiation therapy (RT). Local control rates with PBT appear similar to or, in some cases, higher than photon RT in uncontrolled and retrospective studies. Randomized trials comparing equivalent doses of PBT and photon RT are not available. SUMMARY: Referral for PBT is recommended for patients being treated with curative intent, with an expectation for long-term survival, and who are able and willing to travel abroad to a proton facility. Commonly accepted indications for referral include chordoma and chondrosarcoma, intraocular melanoma, and solid tumours in children and adolescents occurring in patients with greatest risk of long-term sequelae. Current data do not provide sufficient evidence to recommend routine referral of patients with most head and neck, breast, lung, gastrointestinal tract, and pelvic cancers including prostate cancer. It is recommended that all referrals be considered by a multidisciplinary team to select appropriate cases.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.002 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.002 | 0.001 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".