ISO 18939:2013建立了测量用于存储医疗记录的摄影胶片稳定性的试验方法。它适用于基于热处理材料（光热成像、热成像、微胶囊）或通过喷墨打印创建的用于传输模式的胶片上的灰度图像。热处理材料以安全聚酯[聚对苯二甲酸乙二醇酯]为基础，主要与分散在非凝胶乳液或基于染料的微胶囊乳液中的苯甲酸银盐协同工作，这些乳液经热处理产生黑白图像。在喷墨打印中，墨滴被喷射到带有油墨接收层的胶片上，以产生灰度图像。 ISO 18939:2013不包括湿处理黑白胶片或黑白纸。它不适用于彩色喷墨或染料扩散热转移（D2T2）产生的医学彩色图像或彩色印刷品。它也不包括打印在反光材料上的用于转诊的医学灰度图像，也不包括无胶片系统，如医学成像中的图像存档和通信系统（PACS）。 ISO 18939:2013要求任意选择颜色和感知对比度变化的“说明性终点”，以描述物理老化引起的可量化变化。根据什么推断？由于放射科医生缺乏相应的统计显著评分，说明性终点没有任何经证实的诊断或临床相关性。

ISO 18939:2013 establishes test methods for measuring the stability of photographic films intended for storage of medical records. It is applicable to greyscale images on films for use in transmission mode that are based on thermally processed materials (photothermography, thermography, microcapsule) or created by inkjet printing. Thermally processed materials have a base of safety polyester [poly (ethylene terephthalate)] and work predominantly with silver behenate salts dispersed in non-gelatinous emulsions or dye-based microcapsule emulsions that are thermally processed to produce a black-and-white image. In inkjet printing ink droplets are jetted onto a film with an ink-receiving layer to produce a greyscale image. ISO 18939:2013 does not cover wet-processed black-and-white films or black-and-white paper. It is not applicable to medical colour images or colour prints created by colour inkjet or dye diffusion thermal transfer (D2T2). Neither does it cover medical greyscale images printed on reflective materials for referral purposes or filmless systems such as picture archiving and communication systems (PACS) in medical imaging. ISO 18939:2013 requires the arbitrary choice of "illustrative end points" for changes in colour and perceived contrast to depict quantifiable changes due to physical ageing. Extrapolations based on?illustrative end points' do not have any proven diagnostic or clinical relevance due to the lack of corresponding statistically significant scoring by radiologists.