Teaching Neuro <i>Images</i> : Confirmation of prenatal periventricular venous infarction with susceptibility-weighted MRI
Bibliographic record
Abstract
Parents of a healthy child with an unremarkable perinatal history noted a right-hand preference at 4 months and left hemiparesis by 6 months. MRI was not completed until 27 months (figure), confirming periventricular venous infarction (PVI). Stroke causes most term-born hemiplegic cerebral palsy (CP). Many are arterial ischemic strokes but PVI has emerged as a common and unique cause. Preterm, in utero germinal matrix hemorrhage results in medullary venous infarction. 1,2 Of unique PVI imaging features, confirmation of this remote hemorrhage provides the strongest evidence. Increased sensitivity of susceptibility-weighted imaging to detect this suggests it should be standard in CP imaging. Figure Periventricular venous infarction Coronal T2 (A, inset) demonstrates a focal periventricular white matter lesion, sparing cortex and basal ganglia, with subependymal linear hypointensity (open arrow) and ex vacuo ventricular dilatation suggesting periventricular venous infarction (PVI). Gradient-echo T2*-weighted caudothalamic and subependymal hypointensities (B) are more evident on susceptibility-weighted imaging (C) due to blooming artifact.
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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 | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| 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".