title: Radioisotopic methods in the diagnosis of pulmonary embolism.
mesh_terms: D000792:Angiography; D006801:Humans; D011652:Pulmonary Circulation; D011655:Pulmonary Embolism / Q000175:diagnosis* / Q000000981:diagnostic imaging; D011877:Radionuclide Imaging; D013667:Technetium; D014692:Ventilation-Perfusion Ratio; D014978:Xenon
chemical_list: D014978:Xenon; D013667:Technetium