{"artifact_id":"L1-066","layer":"L1","title":"Electrical Impedance Tomography (EIT)","domain":"Medical Imaging","sub_domain":"Electrical-conductivity internal imaging via surface electrodes","physics_fingerprint":{"L_DAG":4.5,"title":"Electrical Impedance Tomography (EIT)","domain":"Medical Imaging","carrier":"radio_wave","primitives":["L.current_injection","D.voltage_measure","L.inverse_poisson","int.spatial"],"sub_domain":"Electrical-conductivity internal imaging via surface electrodes","noise_model":"gaussian","problem_class":"nonlinear_inverse","solution_space":"2D_conductivity_map","difficulty_delta":10,"integration_axis":"spatial","sensing_mechanism":"electrical_impedance"},"observable_profile":{"metric":"PSNR_dB","regime":"Existence of the recovered 2D conductivity map is guaranteed within the declared Omega bounds. Uniqueness is local rather than global (non-convex landscape); convergence depends on initialisation and priors. Stability is moderately conditioned (kappa_eff ~= 30); electrode_contact dominates the stability cliff; model_geometry_error and the remaining mismatch parameters contribute higher-order bias terms. Additive gaussian thermal/electronic noise sets the irreducible data-fidelity floor, while TV / wavelet-sparsity / deep priors stabilise recovery at the ill-conditioned end of Omega.","secondary":"SSIM"},"size_tiers":{"center_spec":{"omega":{"H":128,"W":128,"drift":0.0,"SNR_dB":25,"N_patterns":16,"N_electrodes":32,"electrode_contact":1.0,"noise_amplification":0.1,"model_geometry_error":0.05},"input_format":"measurement_only","problem_class":"eit","forward_operator":"eit_forward","epsilon_fn_center":"14.0"},"omega_bounds":{"H":[32,512],"W":[32,512],"drift":[0.0,0.3],"SNR_dB":[0.0,40.0],"N_patterns":[4,128],"N_electrodes":[8,256],"electrode_contact":[0.3,1.0],"noise_amplification":[0.0,0.5],"model_geometry_error":[0.0,0.3]},"epsilon_bounds":{"psnr_db":[5.0,45.0]},"allowed_problem_classes":["eit"],"allowed_omega_dimensions":["N_electrodes","N_patterns","H","W","SNR_dB","electrode_contact","model_geometry_error","noise_amplification","drift","electrode_contact","model_geometry_error","noise_amplification","drift"],"allowed_forward_operators":["eit_forward"]},"hardness_fn":{"type":"epsilon_fn","delta":10,"kappa":600,"metric":"PSNR_dB"},"initiator_dataset":[{"name":"primary","weight":1.0,"ipfs_cid":null,"license_hash":null}],"status":"testnet","staked_pwm":0.0,"chain_hash":"0xeb0170bb6d873e52de6292d1472e2e155e54a013bf626ef4cf4859f9f29211ae","chain_tx_hash":"0x150005ce17882e20bd51b492c655298630313d56c326de5b76fe3f71f14717d5","chain_block":41553359}