Catalogue of X-ray energy spectra of electronic brachytherapy (eBT) device Papillon 50 manufactured by Ariane Medical Systems

The catalogue was compiled from suitable data available in literature and from the data measured or created by the project "18NRM02 PRISM-eBT" (Primary standards and traceable measurement methods for X-ray emitting electronic brachytherapy devices; http://www.ebt-empir.eu/) of the European Metrology Programme for Innovation and Research (EMPIR). The main goal of the catalogue was to develop a set of harmonised reference X-ray qualities denoted as “eBT equivalent” that would be established for in-laboratory activities by the X-ray tubes usually available for calibration in calibration laboratories, but the tube voltage and the filter are specifically selected to simulate the energy spectrum of the corresponding eBT radiation as closely as possible at the reference point. The catalogue contains the following spectra: 1) X-ray photon fluence eBT spectra measured and/or Monte Carlo simulated in air and/or in water, whenever they were available; 2) eBT-equivalent X-ray photon fluence spectra that match selected eBT spectra. Typically, the eBT-equivalent spectra were calculated by a dedicated software, usually SpekPy software. If available, the eBT-equivalent spectra already realized are also included. Please note that the eBT-equivalent spectra may be site-dependent, based on properties of X-ray generator available (anode angle, inherent filtration) and the distance from anode to measurement point (attenuation in air). Realized eBT-equivalent spectra should be validated by spectrometry.本目录的数据来源分为两类：其一为公开文献中可获取的适宜实验数据，其二为欧洲计量创新与研究计划（European Metrology Programme for Innovation and Research, EMPIR）下属的"18NRM02 PRISM-eBT"项目（X射线发射式电子近距离治疗（electronic brachytherapy, eBT）设备的基准标准与可溯源测量方法；http://www.ebt-empir.eu/）所实测或生成的原始数据。 本目录的核心研制目标为构建一套标准化的参考X射线质组，命名为"eBT等效"质组。该质组将依托校准实验室中常规用于校准工作的X射线管开展实验室内部校准活动，同时会针对性选取管电压与滤过片参数，以在参考测量点处尽可能精准复现对应eBT辐射的能谱特征。 本目录收录以下两类光谱数据： 1) 于空气中及/或水中实测得到，或经蒙特卡罗（Monte Carlo）模拟得到的X射线光子注量eBT能谱，凡有可用数据均纳入收录； 2) 与选定eBT能谱匹配的eBT等效X射线光子注量能谱。此类eBT等效能谱通常通过专用计算软件生成，其中以SpekPy软件最为常用。若已存在实际搭建完成的eBT等效能谱数据，亦将一并收录。需特别说明的是，eBT等效能谱可能因X射线发生器的固有属性（如靶角、固有滤过）以及靶面至测量点的距离（空气衰减量）而存在场地依赖性。实际搭建的eBT等效能谱需通过光谱测量法完成验证。