{"artifact_id":"L1-035","layer":"L1","title":"Fluoroscopy (real-time X-ray)","domain":"Medical Imaging","sub_domain":"Live X-ray imaging with image intensifier / flat panel","physics_fingerprint":{"L_DAG":2.8,"title":"Fluoroscopy (real-time X-ray)","domain":"Medical Imaging","carrier":"x_ray","primitives":["L.xray_source","L.beer_lambert","D.image_intensifier","int.spatial"],"sub_domain":"Live X-ray imaging with image intensifier / flat panel","noise_model":"shot_poisson","problem_class":"linear_inverse","solution_space":"2D_attenuation_projection","difficulty_delta":3,"integration_axis":"spatial","sensing_mechanism":"xray_projection"},"observable_profile":{"metric":"PSNR_dB","regime":"Existence of the recovered 2D attenuation 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 moderately conditioned (kappa_eff ~= 10); scatter dominates the stability cliff; frame_rate_limits 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":1024,"W":1024,"fps":30,"kVp":80,"scatter":0.1,"pixel_um":200,"low_dose_noise":0.0,"dose_rate_uGy_per_s":0.5,"pincushion_distortion":0.0},"input_format":"measurement_only","problem_class":"fluoroscopy","forward_operator":"fluoroscopy_forward","epsilon_fn_center":"26.0"},"omega_bounds":{"H":256,"W":256,"fps":[10,60],"kVp":[60,120],"scatter":[0.0,0.4],"pixel_um":[100,500],"low_dose_noise":[0.0,0.3],"frame_rate_limits":[0.0,0.5],"dose_rate_uGy_per_s":[0.1,10],"pincushion_distortion":[0.0,0.1]},"epsilon_bounds":{"psnr_db":[5.0,45.0]},"allowed_problem_classes":["fluoroscopy"],"allowed_omega_dimensions":["H","W","fps","kVp","dose_rate_uGy_per_s","pixel_um","scatter","low_dose_noise","pincushion_distortion","scatter","frame_rate_limits","low_dose_noise","pincushion_distortion"],"allowed_forward_operators":["fluoroscopy_forward"]},"hardness_fn":{"type":"epsilon_fn","delta":3,"kappa":200,"metric":"PSNR_dB"},"initiator_dataset":[{"name":"primary","weight":1.0,"ipfs_cid":null,"license_hash":null}],"status":"testnet","staked_pwm":0.0,"chain_hash":"0x7632b7d44ea0df4fc0319b9d4dc8322b32576ece9110e4566309deebe3ae0761","chain_tx_hash":"0x3a3546d0c37aaa2ce4f9b6fb30d4d95789c95c72b21e3c3dd8da3f9d9cb23f6f","chain_block":41553371}