國際放射防護委員會(International Commission on Radiological Protection，ICRP)在2012年提出，將工作人員眼球水晶體之等價劑量限制由一年內不得超過150毫西弗，調降為五年加總不得超過100毫西弗(年平均最好不超過20毫西弗)，因此，如何準確地評估出眼球水晶體劑量成為國際間近來熱門的議題。在所有輻射工作人員之中，又以介入性放射診療之醫師為得到輻射誘發白內障的高危險群。本研究主要目的為評估台灣的介入性放射診療醫療工作人員的眼球水晶體劑量，將兩種熱發光劑量計放置於侖道假體之眼球周遭與人員劑量佩章放置於侖道假體身上；將模擬輻射工作人員的侖道假體置於介入性診療之透視X光機的攝影室裡接受曝露，針對不同的照射條件與不同的劑量劑之結果比較。
　　結果顯示於低能光子輻射場下，不同幾何的熱發光劑量計會造成不同的反應，需要給予適當的修正。而人員劑量佩章常規配戴位置所評估出來的眼球水晶體的劑量值，並不適合當作正確的眼球水晶體劑量依據。最後，本研究推估的輻射工作人員年眼球劑量的結果顯示，介入性放射診療醫療人員的眼睛水晶體為輻射曝露的高危險群，年劑量皆高於新眼球水晶體年限值，希望藉由本研究能促使介入性診療輻射工作人員眼球水晶體防護與輻射曝露過高之議題更受重視，進而想辦法改善現況並更加關注輻射工作人員眼睛水晶體的安全議題。

The International Commission on Radiological Protection (ICRP) recommended that the equivalent dose limit for the lens of the eye be decreased from 150 mSv/y (ICRP, 2007) to 20 mSv/y averaged over five years (ICRP, 2011). How to accurately measure the eye-lens dose has, therefore, been an issue of interest recently. Interventional radiologists are at a higher risk of radiation-induced eye injury, such as cataracts, than all other occupational radiation workers. The main objective of this study is to investigate the relationship between the doses to the eye lenses of interventional radiologists measured by different commercial eye-lens dosimeters. This study measured a reference eye-lens dose, which involved placing thermoluminescent dosimeter (TLD) chips at the surface of the eye of the Rando Phantom, and the TLD chips were covered by a 3-mm-thick tissue-equivalent bolus. Commercial eye-lens dosimeters, such as a headband dosimeter and standard personnel dose badges, were placed at the positions recommended by the manufacturers. The results show that the personnel dose badge is not an appropriate dosimeter for evaluating eye-lens dose when it is worn on the chest inside a lead apron. Dose deviations for different dosimeters are discussed and presented in this study. Besides, the eye-lens dose measured by the headband dosimeter may estimate a higher dose to the eye lens than the dose measured by TLD-100H chips due to difference of physical TLD geometry and difference response in a low-energy photon filed. Therefore, the correction factor of energy dependence for TLD is important. Additionally, the issue of eye-lens dose accepted by interventional radiologists in Taiwan should be studied in the near future as their doses are already over the new dose limit.

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