{"artifact_id":"L1-036","layer":"L1","title":"Digital Mammography","domain":"Medical Imaging","sub_domain":"Low-energy X-ray breast imaging","physics_fingerprint":{"L_DAG":2.8,"title":"Digital Mammography","domain":"Medical Imaging","carrier":"x_ray","primitives":["L.xray_source","L.compression","L.beer_lambert","int.spatial"],"sub_domain":"Low-energy X-ray breast imaging","noise_model":"shot_poisson","problem_class":"linear_inverse","solution_space":"2D_breast_projection","difficulty_delta":3,"integration_axis":"spatial","sensing_mechanism":"mammography_xray"},"observable_profile":{"metric":"PSNR_dB","regime":"Existence of the recovered 2D breast projection is guaranteed within the declared Omega bounds. Uniqueness holds on the measurement-supported subspace; out-of-support modes are controlled by the declared priors. Stability is well-conditioned (kappa_eff ~= 9); scatter dominates the stability cliff; compression_variation and the remaining mismatch parameters contribute higher-order bias terms. Photon-shot-noise-limited (poisson counting) sets the irreducible data-fidelity floor, while mild Tikhonov or analytic inversion is sufficient at the nominal Omega point.","secondary":"SSIM"},"size_tiers":{"center_spec":{"omega":{"H":4096,"W":3328,"kVp":28,"mAs":75,"scatter":0.1,"pixel_um":50,"dense_tissue_overlap":0.0,"compression_variation":0.0},"input_format":"measurement_only","problem_class":"mammography","forward_operator":"mammography_forward","epsilon_fn_center":"35.0"},"omega_bounds":{"H":2048,"W":1664,"kVp":[22,34],"mAs":[10,400],"scatter":[0.0,0.3],"pixel_um":[25,100],"dense_tissue_overlap":[0.0,0.5],"compression_variation":[0.0,0.2],"geometric_magnification":[1.0,2.0]},"epsilon_bounds":{"psnr_db":[5.0,45.0]},"allowed_problem_classes":["mammography"],"allowed_omega_dimensions":["H","W","kVp","mAs","pixel_um","scatter","compression_variation","dense_tissue_overlap","scatter","compression_variation","dense_tissue_overlap","geometric_magnification"],"allowed_forward_operators":["mammography_forward"]},"hardness_fn":{"type":"epsilon_fn","delta":3,"kappa":180,"metric":"PSNR_dB"},"initiator_dataset":[{"name":"primary","weight":1.0,"ipfs_cid":null,"license_hash":null}],"status":"testnet","staked_pwm":0.0,"chain_hash":"0xeff332ec150d64d8ce07d27d7f3d4370132bc437f35c6726f04a0a9fb59d816d","chain_tx_hash":"0x1cb31a095e9536b02a750de30141eb5f77f2e96740c572822bb3960a1c2d5bba","chain_block":41553385}