Computed tomography perfusion source images assessment of infarct core and penumbra in acute stroke
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Bibliographic record
Abstract
OBJECTIVE: The purpose of this study was to develop a methodology on computed tomography (CT) perfusion source images for an acute ischemic stroke in predicting infarct core and penumbra. METHODS: Computed tomography examinations, including non-contrast enhanced CT, CT perfusion and CT angiography, were performed on 24 patients with symptoms of stroke in less than 9 hours. The Alberta Stroke Program Early CT Score (ASPECTS) was analysed on arterial and venous phase CT perfusion source images and then compared with the ASPECTS on follow-up imaging for an efficacy assessment. RESULTS: The ASPECTS on arterial phase CT perfusion source images was significantly different from venous phase CT perfusion source images (z=-2.812, p=0.005); linear regression analysis revealed that there was a statistically significant relationship between venous phase CT perfusion source images and the follow-up imaging (beta=0.715, p=0.003). CONCLUSION: The limited data suggested that CT perfusion source images of both arterial and venous phases may have the potential of being used as an assessment for infarct core and penumbra in acute ischemic stroke.
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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) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| 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 it