Radiology for the surgeon: musculoskeletal case 32. Divot fracture of the tibia.
Bibliographic record
Abstract
Presentation A 33-year-old man came to the emergency department after an assault. One of his complaints was pain in his anterior shin from a direct blow to the area with an iron bar. Physical examination revealed a superficial contusion in the region with focal underlying tenderness. A coned anteroposterior radiograph of the distal tibia and fibula showed a small focal cortical break with minimal upward displacement of a conical bone fragment at the site (Fig. 1, arrow). This abnormality was not visible on a coned oblique view (Fig. 2). Computed tomographic examination with axial imaging on the bone window demonstrated a subtle cortical lucency with minimal overlying periosteal elevation (Fig. 3). The abnormality is clear on a sagittal reconstruction from this examination (Fig. 4, arrow). Fig. 1. Coned anteroposterior radiograph of the distal tibia and fibula. Fig. 2. Coned radiograph, oblique view. Fig. 3. Computed tomographic scan with axial imaging. Fig. 4. Sagittal reconstruction image. What is the diagnosis?
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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 | 0.000 | 0.004 |
| Meta-epidemiology (narrow) | 0.003 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.003 | 0.002 |
| Science and technology studies | 0.003 | 0.001 |
| Scholarly communication | 0.002 | 0.002 |
| Open science | 0.002 | 0.001 |
| Research integrity | 0.011 | 0.004 |
| Insufficient payload (model declined to judge) | 0.028 | 0.006 |
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".