Abstract
Diagnostic methods like selective pulmonary angiography, bronchography, or bronchospirometry for cardiovascular and pulmonary diseases, which can evaluate regional function of the lungs, were established. However, these procedures have the disadvantage of complexity and demand the cooperation of the patient. Recently technical advances such as introduction of new radionuclide preparations, improved imaging devices and computer system concerned with data- procedures, have further enhanced the clinical utility of nuclear medicine. An important problem in the use of xenon isotope in a given patient with cardiovascular or pulmonary disease is detecting regional pathophysiologic conditions of the lungs without any troubles. Defects ar characteristic irregularities in xenon distribution during inhalation or perfusion studies can be obtained in some patients with disorders of airway tracts or blood vessels such as pulmonary thromboembolism, bronchial carcinoma, and pulmonary sequestration etc. (auth)
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