Uhlenbrock D, Hühn E A, Fischer H J
Strahlentherapie. 1984 Aug;160(8):492-6.
The transverse dose distribution in case of X-ray and cobalt irradiation of the retrobulbar space was measured in a water phantom. As expected, the crystalline lens receives a smaller dose by cobalt irradiation with lead shielding in front of the eye than by X-irradiation. In case of cobalt irradiation, the dorsal portions lying within the hypophyseal region can only be sufficiently protected by a special block cast by us in a divergent form and surrounding the irradiation field. If X-ray irradiation is performed with a field size of 2 X 4 cm2, the 50% isodose encloses just the complete retrobulbar space. Taking into consideration a second contralateral field, the crystalline lens is exposed to less than 10% of the maximum dose. Thus the doses applied usually in radiotherapy of endocrine ophthalmopathy, i.e. 15 to 20 Gy, lead to an unproblematic crystalline lens exposure of 150 to 200 rad.
在水模体中测量了球后间隙进行X射线和钴照射时的横向剂量分布。正如预期的那样，与X射线照射相比，通过在眼睛前方使用铅屏蔽的钴照射，晶状体接受的剂量更小。在钴照射的情况下，位于垂体区域内的背侧部分只能通过我们以发散形式铸造的特殊挡块充分保护，该挡块围绕照射野。如果以2×4平方厘米的野大小进行X射线照射，50%等剂量线正好包围整个球后间隙。考虑到对侧的第二个照射野，晶状体接受的剂量小于最大剂量的10%。因此，在内分泌性眼病放射治疗中通常应用的剂量，即15至20 Gy，导致晶状体接受150至200拉德的剂量，这不成问题。
