{"artifact_id":"L2-045-001","layer":"L2","parent_l1":"L1-045","title":"Diffusion MRI (DWI / DTI / HARDI) Mismatch-Only Spec","omega":{"dims":{"H":64,"W":64,"Z":[16,256],"SNR_dB":[0.0,35.0],"motion":[0.0,0.5],"N_directions":[6,256],"B0_distortion":[0.0,0.3],"eddy_currents":[0.0,0.3],"b_max_s_per_mm2":[100,5000],"partial_volume_CSF":[0.0,0.3]},"type":"range"},"epsilon":{"type":"fn","expression":"12.0 + 0.3 * SNR_dB + 2.0 * log2(N_directions / 6) - 8.0 * eddy_currents - 6.0 * motion - 6.0 * B0_distortion"},"difficulty_score":0.5,"delta_tier":5,"fingerprint":"6d2c50a5432dad763e7b113f8b41a84f36d22f1736dc8017b95b05024cae25cc","status":"testnet","submitted_by":"mainnet_mirror","chain_hash":"0x9ec3c82f3b76ef25cd0c716af5cd07827b92d6899acbf6bcca0cdeec4ae70535","chain_tx_hash":"0xe6ce3d5e1d2c49b80439f596511fe4e1dfdbf2f07e969e79a2cd6d8d359b4cd1","chain_block":41552979}