The portable diagnostic imaging technology covered by this document will serve not only the pressing demands for tuberculosis screening and triage but also other diseases. Therefore, the requirements, accessories, hardware and software packages listed in the following specifications are described in detail in order to serve also other pathologies and conditions, like trauma and pneumonia. Through the definition of "minimum technical requirements", this document is recommended to support decision-making regarding the selection, incorporation, allocation and use of portable X-ray systems and is intended for health care providers, managers of imaging departments, procurement and regulatory agencies, policymakers and planning officers in ministries of health, as well as biomedical engineering professionals, medical physicists, the private health sector, medical device industry and intergovernmental and international agencies.