NSP V3 strong-fusion Phase-1 prior

This release contains the best Phase-1 checkpoint from the V3 strong X-ray fusion experiment. It was warm-started from the uploaded v27 prior and trained on 500 LUNA16 cases (450 train / 50 held out).

Checkpoint

• best.pth: best held-out checkpoint, selected at epoch 24
• Held-out Phase-1 PSNR: 34.862 dB
• Input resolution: 128³ volume, 25 sparse projections at 64²
• X-ray fusion: strong fusion enabled
• Null branch: disabled

config.json records the exact training arguments. train_log.txt, phase1_v3_training_curve.png, and phase1_v3_training_metrics.csv provide the 30-epoch training record.

Loading

Use the V3 phase_v27/export_prior_v27.py exporter in this repository and pass best.pth as its checkpoint. The model architecture must be constructed with the matching config.json fields before loading the checkpoint.