# Nuclide record kr-81m (isotope). Data CC BY-NC 4.0, attribute "Data from Nuclide (nuclide.cc)". Whole corpus: https://nuclide.cc/api/v1/nuclide.nt
@prefix schema: <https://schema.org/> .
@prefix nuclide: <https://nuclide.cc/ns#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

<https://nuclide.cc/isotopes/kr-81m/>
  a schema:ChemicalSubstance ;
  nuclide:kind "isotope" ;
  schema:identifier "kr-81m" ;
  schema:name "Krypton-81m"@en ;
  schema:alternateName "81mKr"@en, "Kr-81m"@en, "krypton gas"@en ;
  schema:description "A radioactive gas that a patient simply breathes in and out while the camera runs. It decays in thirteen seconds, so the picture is of ventilation happening now rather than of particles left behind, and it has to be generated in the room from a parent that itself lasts only a few hours."@en ;
  schema:url <https://nuclide.cc/isotopes/kr-81m/> ;
  schema:dateModified "2026-09-23"^^xsd:date ;
  schema:citation <https://pmc.ncbi.nlm.nih.gov/articles/PMC6813289/>, <https://pmc.ncbi.nlm.nih.gov/articles/PMC7808361/>, <http://arxiv.org/pdf/2006.03125>, <https://pubmed.ncbi.nlm.nih.gov/542943/> ;
  nuclide:status "historic" ;
  nuclide:tag "ventilation", "V/Q", "generator", "gas" ;
  nuclide:related <https://nuclide.cc/drugs/technegas/>, <https://nuclide.cc/drugs/tc-99m-maa/>, <https://nuclide.cc/isotopes/tc-99m/>, <https://nuclide.cc/indications/pulmonary-embolism-vq/>, <https://nuclide.cc/technologies/split-function-lung-perfusion/> ;
  nuclide:indications <https://nuclide.cc/indications/pulmonary-embolism-vq/> ;
  nuclide:technologies <https://nuclide.cc/technologies/spect/>, <https://nuclide.cc/technologies/radionuclide-generators-kits/> .