Measurement of the exposure to the eye lens during cerebral occlusive endovascular procedures

Measurement of the exposure to the eye lens was performed during cerebral occlusive endovascular procedures (16 examinations) with thermoluminescent dosimeters. Since an intracerebral endovascular embolization needs long, repeated examinations to completely occlude a cerebral angioma or dural fistula, the cumulated exposure to the lens may reach high levels. The highest exposure per examination was 260 mGy. The calculated cumulated highest exposure per patient (1.6 Gy) remained about 9 times lower as the exposure which could induce a cataract, and the radiation risk was acceptable when considering the benefit of the procedure.