ABSORBED DOSE TO THE ADULT MALE AND FEMALE BRAIN FROM 18F-FLUORODEOXYGLUCOSE
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Bibliographic record
Abstract
The absorbed doses to adult male and female brains from 18F-fluorodeoxyglucose were investigated. A total of eight male and six female patients undergoing clinical positron tomography brain scans were included in this study. This patient population allowed for a comparison of the absorbed dose to the brain in men and women. For each patient, time-activity curves for the brain were generated, yielding cumulated activity measurements for the entire organ. From these cumulated activities the average residence times for both male and female subjects were calculated and then multiplied by the S-values from the MIRDOSE 3.1 software program for absorbed dose estimates. The average absorbed dose per administered activity to the adult male brain was found to be 4.2 x 10(-2) mGy MBq(-1), which is lower than that found for the adult female brain of 5.3 x 10(-2) mGy MBq(-1). Six of the male and all six female subjects were each studied on two separate occasions, allowing for an analysis of within-subject variability. The average variation in the self-dose for all 12 patients was found to be within 14%, suggesting that in most cases this method of obtaining a single dose estimate is precise.
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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 | 0.000 | 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 | 0.000 |
| 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