{"artifact_id":"L2-030-001","layer":"L2","parent_l1":"L1-030","title":"Magnetic Resonance Imaging (MRI) — proton-density / T1 / T2 contrast Mismatch-Only Spec","omega":{"dims":{"H":[64,1024],"W":[64,1024],"Z":[16,1024],"TE_ms":[1,500],"TR_ms":[10,10000],"SNR_dB":[0.0,40.0],"motion":[0.0,0.5],"eddy_currents":[0.0,0.2],"undersampling":[0.0625,1.0],"acceleration_R":[1,16],"B0_inhomogeneity":[0.0,0.3],"coil_sensitivity_drift":[0.0,0.2]},"type":"range"},"epsilon":{"type":"fn","expression":"20.0 + 0.3 * SNR_dB - 10.0 * B0_inhomogeneity - 8.0 * motion - 5.0 * log2(acceleration_R)"},"difficulty_score":0.5,"delta_tier":5,"fingerprint":"aa08f269769abcffb73765b2b404bab464f5880c06edf212c5a7ab122ecb2848","status":"testnet","submitted_by":"mainnet_mirror","chain_hash":"0xfd2ce0c1188c3982034309843acc45207391336d3f4aede5a5ab2ec1a52878e2","chain_tx_hash":"0xdbc039e753f29045e16fb46a841aa4113d4bb68e347654a92a91640d6f3d7d00","chain_block":41553360}