Copyright © 2011 SciRes. OPEN ACCESS X and -rays emission probabilities of 131I and 133Xe

Radioactive nuclides as 131I and 133Xe are in-creasingly used for both clinical diagnosis and therapeutic treatment of the patient. For exam-ple, 131I is used for the treatment of thyroid gland cancer. Otherwise, 133Xe is used in ventilation studies to assess and evaluate pulmonary func-tion and to provide images of the lungs in both cardiac and pulmonary diseases, such as asthma, pulmonary emphysema, bronchiectasis, carci-noma of the lung, and pulmonary embolism 1,2. Furthermore, cerebral blood flow is measured using 133Xe inhalation. In this study, the X and -rays emission probabilities in the decay of 131I and 133Xe were precisely measured with a cali-brated Si(Li) detector. Results of this study were compared using available results in the litera-ture. Good agreement was observed between our results and available results in the literature