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Year : 2010  |  Volume : 6  |  Issue : 3  |  Page : 239-248

External and internal radiation therapy: Past and future directions

1 Agricultural, Medical and Industrial Research School, Nuclear Science and Technology Research Institute, P.O. Box: 31485/498, Karaj, Iran
2 Faculty of Engineering, Research and Science Branch, Islamic Azad University, P.O. Box 14155/4933, Tehran, Iran
3 Department of Biophysics, Faculty of Medicine, Tehran University of Medical Sciences (TUMS), Tehran, Iran

Correspondence Address:
Mahdi Sadeghi
Agricultural, Medical & Industrial Research School, P.O. Box: 31485-498, Gohardast, Karaj
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/0973-1482.73324

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Cancer is a leading cause of morbidity and mortality in the modern world. Treatment modalities comprise radiation therapy, surgery, chemotherapy and hormonal therapy. Radiation therapy can be performed by using external or internal radiation therapy. However, each method has its unique properties which undertakes special role in cancer treatment, this question is brought up that: For cancer treatment, whether external radiation therapy is more efficient or internal radiation therapy one? To answer this question, we need to consider principles and structure of individual methods. In this review, principles and application of each method are considered and finally these two methods are compared with each other.

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