A Pneumatically Actuated Target Stabilization Device for MRI-Guided Breast Biopsy
Bibliographic record
Abstract
This paper introduces a novel tissue stabilization device for magnetic resonance imaging (MRI)-guided breast biopsy. The device is comprised of two pneumatically actuated support plates that would stabilize the biopsy target movements during needle insertion. An optimized geometry for the support plates allows for a good degree of tissue stabilization without relying on large compression forces. The plate configuration can also be adjusted inside the magnet bore using pneumatic actuators driven by pressure-controlled valves that are placed in the MRI control room. This capability allows for the compensation of the target displacement based on MRI image feedback. When combined with a separate needle drive mechanism, this stabilization device would enable in-bore MRI-guided breast biopsy. Experiments performed on chicken breast tissue with a prototype of the device demonstrate the effectiveness of this mechanism in increasing needle targeting accuracy using two simple error correction strategies. Furthermore, MRI compatibility tests are carried out to assess the performance of the device inside MRI.
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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".