IEC 61217:2011适用于与远程放射治疗过程相关的设备和数据，包括与放射治疗计划系统、放射治疗模拟器、等中心伽马射线治疗设备、等中心医用电子加速器和非等中心设备相关的患者图像数据。本标准的目的是定义一套在远程放射治疗过程中使用的一致坐标系，定义刻度的标记（如提供），定义该过程中使用的设备的运动，并在使用时便于计算机控制。 第二版取消并取代1996年出版的第一版、2000年出版的第1次修订版和2007年出版的第2次修订版。本版本构成技术修订版，将成像仪和焦点坐标系纳入第3.12款。除本款外，仅在需要包括上述坐标系的地方进行了修改。

IEC 61217:2011 applies to equipment and data related to the process of teleradiotherapy, including patient image data used in relation with radiotherapy treatment planning systems, radiotherapy simulators, isocentric gamma beam therapy equipment, isocentric medical electron accelerators, and non-isocentric equipment when relevant. The object of this standard is to define a consistent set of coordinate systems for use throughout the process of teleradiotherapy, to define the marking of scales (where provided), to define the movements of equipment used in this process, and to facilitate computer control when used. This second edition cancels and replaces the first edition, published in 1996, amendment 1, published in 2000 and amendment 2, published in 2007. This edition constitutes a technical revision to include imager and focus coordinate systems in Subclause 3.12. Beyond this Subclause, changes were only introduced where needed to include the above coordinate systems.