Tissue optical properties correction of multispectral singlet oxygen luminescent dosimetry (MSOLD) for BPD-mediated Photodynamic Therapy
Bibliographic record
Abstract
Significance Direct detection of singlet-state oxygen (¹O₂) is vital for type II PDT and achievable through multispectral singlet oxygen dosimetry (MSOLD). However, tissue scattering and absorption variations impact signal accuracy, necessitating correction factors. Approach A 690 nm CW laser (500 mW/cm²) excited Benzoporphyrin derivative (BPD) in methanol. The singlet oxygen spectrum was decomposed into ¹O₂ signal, BPD luminescence, and laser background using Singular Value Decomposition (SVD). Measurements were conducted in phantoms with varying optical properties: ink (= 0.1 – 1 cm⁻¹) and intralipid (= 5 – 40 cm⁻¹). Monte Carlo simulations validated the results. Results The ¹O₂ signal decreased nearly linearly with, while effects were influenced by detection fiber positioning. Experimental and simulated results showed strong agreement. Conclusions This study provides correction factors to enhance MSOLD accuracy under varying optical conditions, advancing its clinical application in PDT.
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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 | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| 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".