Observation of the Ultrasonic Vibration Potential with an Instrumented Coaxial Needle Probe
Bibliographic record
Abstract
Stereotactic core biopsies typically use ultrasound imaging to locate tumours and guide a biopsy needle toward them. Due to the poor resolution of ultrasound images, oftentimes it is difficult to ensure that the needle reaches the target before the tissue is sampled resulting in false negatives. Sensor-instrumented needles provide an efficient way of characterizing the tissue at the needle tip to improve tumour targeting. A modality that has not been considered for real-time tissue characterization is the ultrasonic vibration potential (UVP) of the medium - a small electric signal generated within the tissue when subjected to ultrasonic pressure. The magnitude of the UVP depends on the electroacoustic properties of the tissue, providing valuable information about the relative tissue composition. This paper investigates, for the first time, the feasibility of measuring the ultrasonic vibration potential (UVP) of assorted media using an instrumented biopsy needle. The results show that the UVP can be effectively measured using the proposed instrumented needle providing electroacoustic data that can be used in future work for real-time tissue classification during stereotactic procedures.
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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 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| 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".