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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Radiation retinopathy ： ウィキペディア英語版 Radiation retinopathy Radiation retinopathy is damage to retina due to exposure to ionizing radiation. Radiation retinopathy has a delayed onset, typically after months or years of radiation, and is slowly progressive. In general, radiation retinopathy is seen around 18 months after treatment with external-beam radiation and with brachytherapy. The time of onset of radiation retinopathy is between 6 months to 3 years.〔 An exposure to doses of 30-35 grays (Gy) or more is usually required to induce clinical symptoms, however, retinopathy may develop after as little as 15 Gy of external-beam radiation. A reported safe dose is : per week in five fractions of .〔 ==Pathophysiology== Radiation retinopathy is very similar to other vascular diseases. Diabetes and radiation primarily damage the retinal capillaries. Diabetes results in early loss of pericytes and thickening of the basement membrane. Radiation however, damages the endothelial cells. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Radiation retinopathy」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.