title: Nonsegmental ventilation-perfusion scintigraphy mismatch after radiation therapy.
abstract: OBJECTIVE
  This report illustrates the utility of ventilation-perfusion scintigraphy in differentiating radiation pneumonitis from other causes of dyspnea, including pulmonary embolism, heart failure, obstructive tumor, and chronic obstructive pulmonary disease.
  
  
  RESULTS
  A nonsegmental mismatched perfusion abnormality, which exactly conformed to a radiation port, was diagnostic of radiation pneumonitis.
  
  
  CONCLUSIONS
  In patients with lung tumors presenting with dyspnea, ventilation-perfusion scintigraphy may be useful in diagnosing radiation pneumonitis and effectively excluding other causes of dyspnea.
authors.affiliation: Department of Radiology, Johns Hopkins Medical Institutions, Baltimore, Maryland 21287, USA. bchin@rad.jhu.edu
authors.forename: B B
authors.initials: BB
authors.lastname: Chin
authors.forename: J S
authors.initials: JS
authors.lastname: Welsh
authors.forename: L
authors.initials: L
authors.lastname: Kleinberg
authors.forename: D
authors.initials: D
authors.lastname: Ettinger
authors.forename: P
authors.initials: P
authors.lastname: White
mesh_terms: D002289:Carcinoma, Non-Small-Cell Lung / Q000532:radiotherapy; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008168:Lung / Q000000981:diagnostic imaging / Q000528:radiation effects; D008175:Lung Neoplasms / Q000532:radiotherapy; D008875:Middle Aged; D011655:Pulmonary Embolism / Q000000981:diagnostic imaging; D017564:Radiation Pneumonitis / Q000000981:diagnostic imaging*; D011877:Radionuclide Imaging; D019275:Radiopharmaceuticals; D013668:Technetium Tc 99m Aggregated Albumin; D014692:Ventilation-Perfusion Ratio
chemical_list: D019275:Radiopharmaceuticals; D013668:Technetium Tc 99m Aggregated Albumin