Shifting the Spotlight to Low-Dose Rate Radiobiology in Radiopharmaceutical Therapies: Mathematical Modeling, Challenges, and Future Directions
Bibliographic record
Abstract
Radiopharmaceutical therapy (RPT) is an established treatment modality and is of increasing interest for different cancer types. A key unmet need, both in the wider adoption of RPT and in the improvement of outcomes with existing RPTs, is in treatment planning and optimization. Research efforts have been hindered by the incomplete understanding of the radiobiology RPTs. Modeling in RPT often mirrors external beam radiotherapy (EBRT), despite key differences. The dose rate (DR) is notably distinct between the two, influencing radiation responses. In EBRT, radiation is acutely delivered in discrete transient fractions of relatively short duration, with a near-constant DR. In RPT, by contrast, exposure is gradual, protracted, and characterized by temporal nonuniformities arising from organ-specific radio-pharmacokinetics. As a result, low-DR (LDR) radiobiology adapted for RPT (LDR-RPT) has emerged as a vibrant area of research. In this review, we discuss the state-of-the-art understanding of the etiological mechanisms underlying cellular and tissue-level dose responses in LDR-RPT, with a focus on how this radiobiological knowledge is codified in mathematical and computational models. We also describe current feasibility and future prospects for utilizing such quantitative radiobiological models to perform personalized RPT planning and highlight research directions that should be prioritized to accelerate clinical adoption.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.003 | 0.005 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.002 | 0.001 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.002 |
| Scholarly communication | 0.003 | 0.004 |
| Open science | 0.002 | 0.002 |
| Research integrity | 0.002 | 0.004 |
| Insufficient payload (model declined to judge) | 0.003 | 0.001 |
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 source (direct Gemma or distilled Codex), 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".