Minimum distance processor for biological tissues classification from A-scan ultrasonic signals
Bibliographic record
Abstract
A new technique for biological tissue classification is presented. The classification problem was to find the correct tissue type based on the observed data vectors which were assumed to consist of the true underlying backscattered signal and an additive white Gaussian noise due to the measuring system. The power spectrum of the maximum likelihood estimate (MLE) of the backscatter signal was used to classify the different tissue types. Each MLE observation vector was computed from 60 A-scans. Three different biological tissues were used as hypotheses for the classification problem: liver, kidney and pancreas. Using the Bayes criterion and the general Gaussian problem was reduced to that of the design of a minimum distance processor by a change of coordinate system. The new coordinate system was computed by the Gram-Schmidt orthogonalization method. Results obtained from the three different tissues (kidney, liver and pancreas) revealed the probability of correct classification at 90%.
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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 | 0.000 |
| 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 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".