{"id":"W4407833676","doi":"10.2139/ssrn.5144532","title":"Preliminary Study of a Stretched-Exponential Model of Rf Depolarization of Hyperpolarized 129xe for Highly Accelerated Pulmonary MRI","year":2025,"lang":"en","type":"preprint","venue":"SSRN Electronic Journal","topic":"Atomic and Subatomic Physics Research","field":"Physics and Astronomy","cited_by":0,"is_retracted":false,"has_abstract":false,"ca_institutions":"Western University","funders":"","keywords":"Depolarization; Nuclear magnetic resonance; Physics; Exponential function; Hyperpolarization (physics); Radio frequency; Medicine; Internal medicine; Mathematics; Nuclear magnetic resonance spectroscopy; Engineering; Electrical engineering; Mathematical analysis","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":[0.001034619,0.0007281833,0.000678742,0.0003322569,0.0004844919,0.000793964,0.001362116,0.001327435,0.003116802],"category_scores_gemma":[0.004740579,0.0003249503,0.001007659,0.0003049951,0.0004726478,0.00153955,0.0004977562,0.00105776,0.0004654752],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.0005344888,"about_ca_system_score_gemma":0.0005961165,"about_ca_topic_candidate":false,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.002954597,"about_ca_topic_score_gemma":0.001863462,"domain_scores_codex":[0.999851,0.00007071353,0.000006247863,0.00002253155,0.00002966416,0.00001987342],"domain_scores_gemma":[0.9987827,0.0007235712,0.00009178701,0.00009507337,0.0002150827,0.00009178025],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"simulation_or_modeling","study_design_gemma":"simulation_or_modeling","study_design_scores_codex":[0.0004840365,0.0002686871,0.002258442,0.000566455,0.0001157912,0.002291645,0.0007795035,0.6304181,0.0780529,0.2656273,0.002891803,0.01624535],"study_design_scores_gemma":[0.00001086568,0.0000233426,0.0003423458,0.00001184028,0.00001005013,0.0001001305,0.00001649982,0.9907508,0.001090645,0.007246365,0.0003827628,0.00001420277],"study_design_candidate":"simulation_or_modeling","study_design_consensus":"simulation_or_modeling","genre_codex":"methods","genre_gemma":"empirical","genre_scores_codex":[0.2912138,0.002941713,0.6840228,0.001695942,0.0002476196,0.0002035486,0.0002294923,0.0003893466,0.01905577],"genre_scores_gemma":[0.9428201,0.001453683,0.03875122,0.0002117383,0.0001875207,0.0001080237,0.0001778447,0.0002155865,0.01607437],"genre_candidate":"empirical","genre_consensus":null,"teacher_disagreement_score":0.003116802,"threshold_uncertainty_score":0.01042676,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.02646413662061823,"score_gpt":0.302858257458756,"score_spread":0.2763941208381377,"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."}}