Improving Intraoperative Liver Registration in Image-Guided Surgery with Learning-Based Reconstruction
Bibliographic record
Abstract
Nonrigid image-to-physical registration is a crucial component in image-guided liver surgery. To overcome the problems caused by noisy, partial, and sparse intraoperative sampling, we propose a novel occupancy-learning-based mesh to point cloud registration and apply it to align the preoperative liver image to intraoperative samples. We train a point cloud deep network to reconstruct occupancy function from sparse points and use this reconstructed liver to guide the nonrigid registration. Experiments show this method reduces Target Registration Error (TRE) of rigid and nonrigid baselines by 21.5% and 11.8%. For training this occupancy network, a novel crossover method is proposed to synthesize deformed liver meshes and points. We demonstrate that the system is robust to the imperfectness of generated training data. This method might be useful in other areas that require soft-tissue registration, where only very sparse data is available during acquisition.
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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".