F-18 FDG Brain PET and Tc-99m ECD Brain SPECT in a Patient With Multiple Recurrent Epileptic Seizures
Bibliographic record
Abstract
The combination of interictal brain fluorine-18 fluorodeoxyglucose positron emission tomography (F18-FDG PET) and ictal brain Tc-99m ethylcysteinate dimer (ECD) SPECT is currently used for identification of epileptic foci. Usually, hypometabolism is demonstrated on the F-18 FDG PET and hyperperfusion in the same region on the Tc-99m ECD ictal SPECT. The authors report a rare occurrence of left frontal hypermetabolism in a young girl with multiple recurring epileptic seizures, on F18-FDG PET, which was confirmed on ictal Tc-99m ECD SPECT. The patient's seizures were characterized by head deviation and movements of the upper extremities. The seizures were occurring non stop every 3 to 5 minutes, even during imaging, lasting about 15 seconds. Magnetic resonance imaging (MRI) showed evidence of dysplastic cortex which was consistent with the focal abnormalities on PET and SPECT.
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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 | 0.006 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| 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) | 0.001 | 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".