Reconstructing 3D bone geometry from 2 X-ray silhouettes using a statistical shape model + differentiable rendering [P]

A developer is working on a pipeline to reconstruct 3D distal femur geometry from two orthogonal X-ray views (PA + lateral) without using CT scans, neural networks, or large training sets. The most challenging aspect was achieving correspondence, with various methods like KD-tree nearest neighbor (50.7x roughness), CPD (28.2x), BCPD (47.5x), and FilterReg failing to meet the 5x acceptance gate. ShapeWorks was the only successful method, achieving 3.3x roughness. The developer is currently working on real X-ray validation and automatic segmentation.