ENH: Verify tetmesh quality after fit to patient - #135
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WalkthroughThe PR adds ChangesTetrahedron Repair Integration
Estimated code review effort: 3 (Moderate) | ~25 minutes Merge Risk: 🟡 Moderate · up to The new mesh repair can produce inconsistent geometry and may validate different tetrahedra from those used during physics-informed training. These issues should be corrected before merge to avoid failed training or invalid volume calculations. Sequence Diagram(s)sequenceDiagram
participant ReferenceMesh
participant ContourTools
participant TrainingFlow
participant TutorialFlow
ReferenceMesh->>ContourTools: repair_inverted_tetrahedra
ContourTools-->>TrainingFlow: repaired mesh
TrainingFlow->>TrainingFlow: extract points and calculate volume weights
ContourTools-->>TutorialFlow: repaired fitted reference model
TutorialFlow->>TutorialFlow: save fitted reference model
🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
✨ Finishing Touches🧪 Generate unit tests (beta)
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🟡 Changes recommended
The new repair routine needs clearer failure diagnostics for non-tetra inputs and should be covered by a focused unit test to prevent regressions.
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Pull request overview
Enhances the Physics-Informed Motion workflow by proactively validating and repairing fitted tetrahedral reference meshes, so downstream training/tutorial steps don’t encounter inverted or degenerate elements after subject-specific fitting.
Changes:
- Add
ContourTools.repair_inverted_tetrahedra()to relax nodes of inverted/degenerate tetrahedra and fail fast if repair cannot succeed. - Repair fitted tetra meshes before saving them in Tutorial 16 so later tutorials don’t need to handle bad elements.
- Repair fitted tetra meshes at load time in
PhysicsInformedMotiontraining to support meshes generated prior to this check.
File summaries
| File | Description |
|---|---|
| tutorials/tutorial_16_duke_heart_physics_informed_motion_prep.py | Repairs fitted tetra volume meshes before persisting outputs for later tutorial stages. |
| src/monai_physio/train_physicsnemo_physics_informed_motion.py | Repairs per-subject fitted reference meshes when binding training data. |
| src/monai_physio/contour_tools.py | Introduces the tetrahedra repair routine and logging/error behavior. |
Review details
- Files reviewed: 3/3 changed files
- Comments generated: 3
- Review effort level: Lite
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Actionable comments posted: 2
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Inline comments:
In `@src/monai_physio/contour_tools.py`:
- Around line 813-814: Update the smoothing logic around the shown neighbor-mean
assignment to deduplicate each node’s neighbors before averaging, so shared
tetrahedra do not incidence-weight the result. Capture a single snapshot of the
original points at the start of each smoothing pass, compute every node’s target
from that snapshot, and apply targets through a separate output array after all
means are calculated.
In `@src/monai_physio/train_physicsnemo_physics_informed_motion.py`:
- Line 655: Update the repair flow around
contour_tools.repair_inverted_tetrahedra to use the reference mesh points
together with self._tets connectivity, rather than reading connectivity from
mesh.cells_dict. Ensure missing or mismatched file connectivity cannot leave the
physics elements inverted or make tet_volumes fail, and add regression coverage
for both cases.
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📒 Files selected for processing (3)
src/monai_physio/contour_tools.pysrc/monai_physio/train_physicsnemo_physics_informed_motion.pytutorials/tutorial_16_duke_heart_physics_informed_motion_prep.py
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🔵 Needs a closer look
The new _bind_reference_meshes() code uses a misleading pv.read() cast to pv.UnstructuredGrid that should be corrected to match actual .vtp inputs and the repo’s established pv.DataSet convention.
Review details
Suppressed comments (1)
Previously missed (1) — in code that hasn't changed since the last review.
src/monai_physio/train_physicsnemo_physics_informed_motion.py:645
pv.read()can returnpv.PolyData(as exercised by the new.vtptest), so casting it topv.UnstructuredGridis misleading and could hide type/attribute mistakes later. Elsewhere in the repo the convention is to castpv.read()results topv.DataSetwhen only.pointsis needed (e.g. tutorials/tutorial_16_duke_heart_physics_informed_motion_prep.py:538-540).
- Files reviewed: 5/5 changed files
- Comments generated: 0 new
- Review effort level: Lite
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