{"id":"W4281957057","doi":"10.1101/2022.06.02.493125","title":"Normative values of neuromelanin-sensitive MRI signal in older adults obtained using a standard protocol for acquisition and analysis","year":2022,"lang":"en","type":"preprint","venue":"bioRxiv (Cold Spring Harbor Laboratory)","topic":"Neuroscience and Neuropharmacology Research","field":"Neuroscience","cited_by":0,"is_retracted":false,"has_abstract":true,"ca_institutions":"McGill University; Royal Ottawa Mental Health Centre; Montreal Neurological Institute and Hospital; Mental Health Research Canada; University of Ottawa","funders":"","keywords":"Neuromelanin; Normative; Biomarker; Magnetic resonance imaging; Medicine; Psychology; Substantia nigra; Nuclear medicine; Neuroscience; Radiology; Dopamine; Chemistry; Dopaminergic","routes":{"ca_aff":true,"ca_fund":false,"ca_venue":false,"about_ca":false,"invisible_to_affiliation_only":false},"retraction":null,"screen":null,"direct_labels":[],"prediction":{"model_version":"metacan-v3-hybrid-931329e0061c","candidate_categories":[],"consensus_categories":[],"category_scores_codex":[0.004780796,0.0006446448,0.0004420663,0.001618458,0.0006679915,0.0006903221,0.0008020767,0.0006710636,0.002444259],"category_scores_gemma":[0.01192219,0.0002644944,0.0002856113,0.0009844571,0.0004199206,0.0004618464,0.0004991688,0.0003737778,0.001458206],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.0002698452,"about_ca_system_score_gemma":0.0004870159,"about_ca_topic_candidate":false,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.0009265265,"about_ca_topic_score_gemma":0.002516451,"domain_scores_codex":[0.9978988,0.0005154556,0.0006009284,0.0003059872,0.0006093476,0.00006946983],"domain_scores_gemma":[0.9930053,0.0008353489,0.0006488379,0.001431758,0.00393303,0.0001457828],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"design_other","study_design_gemma":"observational","study_design_scores_codex":[0.005977207,0.003244281,0.3408905,0.001574811,0.0004575669,0.003521627,0.006245815,0.003273583,0.2133644,0.004926327,0.02545113,0.3910728],"study_design_scores_gemma":[0.0002861454,0.003014064,0.8780406,0.0004638532,0.0001849775,0.00834521,0.001203941,0.006619557,0.05421631,0.002091358,0.0454076,0.0001264928],"study_design_candidate":"observational","study_design_consensus":null,"genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.7882566,0.001196964,0.1615676,0.0002379527,0.0002146952,0.01163238,0.009980721,0.002343104,0.02456992],"genre_scores_gemma":[0.7335603,0.0007849527,0.2240012,0.000401241,0.0000977441,0.0232167,0.01276748,0.0004692374,0.004701039],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.004780796,"threshold_uncertainty_score":0.02528358,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.03343291361323947,"score_gpt":0.3262180738195815,"score_spread":0.292785160206342,"validation_status":"score_only:v0-immature-baseline","note":"Baseline scores from an immature model (maturity gate not passed). Scores rank; they never assert a category."}}