{"artifact_id":"L1-160","layer":"L1","title":"CT-FLIT (Fluorescence Lifetime Imaging Tomography)","domain":"Multimodal Fusion","sub_domain":"Hybrid x-ray CT + diffuse fluorescence tomography","physics_fingerprint":{"L_DAG":4.5,"title":"CT-FLIT (Fluorescence Lifetime Imaging Tomography)","domain":"Multimodal Fusion","carrier":"photon","primitives":["L.ct_structure","L.diffuse_fluorescence_tomo","L.regularize_with_ct","int.spatial"],"sub_domain":"Hybrid x-ray CT + diffuse fluorescence tomography","noise_model":"shot_poisson","problem_class":"nonlinear_inverse","solution_space":"3D_fluorophore_concentration","difficulty_delta":10,"integration_axis":"spatial","sensing_mechanism":"ct_fluorescence_fusion"},"observable_profile":{"metric":"PSNR_dB","regime":"Existence of the recovered 3D fluorophore concentration 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); tissue_scattering_model dominates the stability cliff; CT_prior_mismatch and the remaining mismatch parameters contribute higher-order bias terms. Photon-shot-noise-limited (poisson counting) 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,"Z":64,"SNR_dB":20,"N_sources":16,"N_detectors":32,"CT_prior_mismatch":0.0,"registration_error":0.0,"fluorophore_leakage":0.0,"tissue_scattering_model":0.0},"input_format":"measurement_only","problem_class":"ct_flit","forward_operator":"ct_flit_forward","epsilon_fn_center":"16.0"},"omega_bounds":{"H":32,"W":32,"Z":[16,256],"SNR_dB":[0.0,35.0],"N_sources":[4,64],"N_detectors":[4,128],"CT_prior_mismatch":[0.0,0.5],"registration_error":[0.0,5.0],"fluorophore_leakage":[0.0,0.3],"tissue_scattering_model":[0.0,0.5]},"epsilon_bounds":{"psnr_db":[5.0,40.0]},"allowed_problem_classes":["ct_flit"],"allowed_omega_dimensions":["H","W","Z","N_sources","N_detectors","SNR_dB","tissue_scattering_model","CT_prior_mismatch","fluorophore_leakage","registration_error","tissue_scattering_model","CT_prior_mismatch","fluorophore_leakage","registration_error"],"allowed_forward_operators":["ct_flit_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":"0x0cf19ebfee032d471c4b093de091920b81f3e8977d1dbf03a7bf61c32a2629d3","chain_tx_hash":"0x81b0ba87b1b71e90896e7418f7e67ee9ab92c8c97a6cb304029d58acfe934d22","chain_block":41554242}