{"id":"https://openalex.org/keywords/relaxivity","display_name":"relaxivity","description":"A measure of how strongly a paramagnetic substance accelerates nuclear magnetic resonance relaxation, especially in magnetic resonance imaging contrast agents.","display_name_alternatives":["relaxivities","magnetic resonance relaxivity"],"ids":{"openalex":"https://openalex.org/keywords/relaxivity","wikidata":null},"primary_topic":{"id":"https://openalex.org/T11279","display_name":"Lanthanide and Transition Metal Complexes","score":0.5663,"subfield":{"id":"https://openalex.org/subfields/2505","display_name":"Materials Chemistry"},"field":{"id":"https://openalex.org/fields/25","display_name":"Materials Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T11279","display_name":"Lanthanide and Transition Metal Complexes","score":0.5663,"subfield":{"id":"https://openalex.org/subfields/2505","display_name":"Materials Chemistry"},"field":{"id":"https://openalex.org/fields/25","display_name":"Materials Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T12405","display_name":"Characterization and Applications of Magnetic Nanoparticles","score":0.1156,"subfield":{"id":"https://openalex.org/subfields/2204","display_name":"Biomedical Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"works_count":4030,"cited_by_count":140040,"works_api_url":"https://api.openalex.org/works?filter=keywords.id:keywords/relaxivity","updated_date":"2026-10-16T04:06:51","created_date":"2026-09-30T00:00:00"}