Update the coordinate transformation pipeline to prioritize the affine
transformation chain recorded in `transform.json` (original_to_source)
instead of relying on re-calculated geometric parameters.
The previous method relied on re-estimating rotation, center, and
bounding boxes from the bone mask, which led to inaccuracies in screw
pillar mapping (e.g., dropping from 99% to 30-94% in-label accuracy).
The new approach uses the precise inverse affine mapping `o = M^-1 (s - t)`
from the transformation metadata.
A fallback mechanism is maintained for legacy volumes lacking
`transform.json`, which continues to use the re-calculation method.
- Implement `load_transform` and `original_to_source` integration
- Update documentation to reflect the new primary/fallback coordinate chains
- Improve precision of screw parameter mapping to native index space
Xiao Furen
0a928d8f8e