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Evaluating dose-response of cataract induction in radiotherapy of head and neck cancers patients
Authors
A.M. Arefpour
T.H. Aryaei
+4 more
M. Bahrami
N. Farshchian
A. Haghparast
K. Khoshgard
Publication date
1 January 2021
Publisher
Abstract
Background: Head and neck cancers are currently the most common types of cancers. 3D-conformal radiation therapy is the most common dose delivery technique for head and neck cancers. Eye Lens is a radio sensitive structure and cataract formation as a visual disorder associated with exposure to ionizing radiation which is documented. Objective: Determining the radiation dose to eye lens during head and neck radiography and estimating the probability of cataract induction are essential. Material and Methods: This experimental study was performed on 14 patients with head and neck cancers through experimental study analysis. The maximum opacity of the eyes lens were measured by pentacam� before radiation therapy. CT data of patients were transmitted to Isogray treatment planning Software, and dose calculations for each patient was performed. At the end of radiation treatment, 3 and 6 months after radiotherapy, the eye lens opacity of the patients was assessed. Results: Overall, 28 lenses were studied. Statistical one sample K-S test proved normality of obtained data. Using repeated measures test, the relation before and 3 months after radiotherapy, as well as the relationship before and 6 months after radiotherapy proved a significant relationship. Conclusion: The opacity caused by radiation in eyes is a non-statistical and linear-quadratic response curve with no threshold. This opacity can also appear within 3 months after completion of radiation therapy. © 2021, Shriaz University of Medical Sciences. All rights reserved
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eprints Iran University of Medical Sciences
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Last time updated on 15/04/2021