With the introduction of digital medical examination vehicles, we intended to increase the efficiency of the mass health screening services by building up an environment convenient to study radiographic images and to make them available promptly for diagnosis and treatment. However, the result was not as good as we had expected. A number of problems came up. Although high precision monitoring devices were installed for radiographic interpretations, lists of examinees expressed only in figures for identification and texts superimposed on radiographic images became so small in type size that the risks of making medical errors and mistaking one examinee for another were increased.　　Therefore, we connected a laptop computer as a portable MWM server to the console to take in information about the examinee when he or she has an X-ray. If the examinee had no hospital ID cards, we issued a provisional ID. To differentiate the examinee with the provisional ID from the individual on the list of the examinees, the running numbers were issued, using the accession numbers indicating the date and time of examination and the kind of modality. Thanks to these new systems, it has been made possible to include information about individuals such as ID, name and sex on X-ray photos. Thus, the reliability of radiologic interpretation has been assured.