Ibanez-Rosello Blanca, Bautista-Ballesteros Juan Antonio, Candela-Juan Cristian, Villaescusa Juan Ignacio, Ballester Facundo, Vijande Javier, Perez-Calatayud Jose
Radioprotection Department, La Fe University and Polytechnic Hospital, Valencia E-46026, Spain.
J Radiol Prot. 2017 Jun 26;37(2):N5-N12. doi: 10.1088/1361-6498/aa56cf. Epub 2017 Mar 2.
Esteya® (Elekta Brachytherapy, Veenendaal, The Netherlands) is an electronic brachytherapy (eBT) system based on a 69.5 kVp x-ray source and a set of collimators of 1 to 3 cm in diameter, used for treating non-melanoma skin cancer lesions. This study aims to estimate room shielding requirements for this unit. The non-primary (scattered and leakage) ambient dose equivalent rates were measured with a Berthold LB-133 monitor (Berthold Technologies, Bad Wildbad, Germany). The latter ranges from 17 mSv h at 0.25 m distance from the x-ray source to 0.1 mSv h at 2.5 m. The necessary room shielding was then estimated following US and some European guidelines. The room shielding for all barriers considered was below 2 mmPb. The dose to a companion who, exceptionally, would stay with the patient during all treatment was estimated to be below 1 mSv if a leaded apron is used. In conclusion, Esteya shielding requirements are minimal.
艾斯特亚（埃莱克塔近距离放射治疗系统，荷兰费嫩达尔）是一种基于69.5 kVp X射线源和一组直径为1至3厘米的准直器的电子近距离放射治疗（eBT）系统，用于治疗非黑色素瘤皮肤癌病变。本研究旨在估算该设备的房间屏蔽要求。使用贝托尔德LB - 133监测仪（德国巴特维尔德巴德的贝托尔德技术公司）测量非原发射线（散射和泄漏）的周围剂量当量率。后者从距离X射线源0.25米处的17毫希沃特/小时到2.5米处的0.1毫希沃特/小时不等。然后根据美国和一些欧洲指南估算所需的房间屏蔽。所有考虑的屏蔽层的房间屏蔽厚度均低于2毫米铅当量。如果使用铅围裙，在所有治疗期间与患者一起的陪同人员所受剂量估计低于1毫希沃特。总之，艾斯特亚的屏蔽要求很低。
