We have been developing a new drug information (DI) system that provides WWW based reporting for drug efficacy, quality and safety. It utilizes a 3-tier reporting model and operates over HOSPnet, the national hospital medical information network. The system provides an adverse drug interaction database that facilitates closer cooperation between physicians and pharmacists. It has an interface that conforms to the International Conference of Harmonization (ICH4), which allows drug efficacy, quality and safety data to be shared in a timely fashion. It also implements an HL7 pharmacy interface, which allows the automatic transfer of drug prescription data from the order entry system to the drug information system.

 There are some systematic approaches about transport activity for the injured by supposing the transport time uniquely. However, the transport time may be irregular in consequence of road traffic condition, weather one and so on. It is necessary to develop an evaluation system with life saving curve and probabilistic distribution of transport time for life saving of the injured.

 In this study, we define the reliability of life saving system by the reliability analysis to evaluate the transport system. As the result of a case study that an airplane accident might break out at Kansai International Airport, it becomes clear that the traditional method might underestimate the risk for the injured and the time zone where the life saving opportunity becomes high can be identifi by the proposed method.

 Failures of hospital information system (HIS) cause egregious impacts on medical service. On June 26 1998, the HIS functions in Ehime University Hospital went down during consultation hours and all HIS functions were out of order for two hours. Just one month and about one year after the trouble day, we surveyed opinions twice concerning HIS from outpatients by questionnaire. These surveys elucidated that (1) the HIS failure led to 2 hours and 45 minutes prolongation of outpatient stay in our hospital, (2) hand writing procedure (i.e., conventional paper slip system) instead of HIS couldn’t absorb the delay due to the HIS failure, (3) there is no significant differences among hospital stay hours in terms of arrival time, (4) nursing staffs were the most familiar for patients to inform HIS failure compared to any other staffs, and squawk box was not so effective to inform it, (5) if time span to reboot HIS is less than 30 minutes, it’s a choice that HIS once reboot without switching HIS function to hand writing procedure. Requirements for the HIS and hospital administration in the future were also discussed.

 The purpose of this study was to compare a new digital chest radiography based on a selenium detector with dual-emulsion screen-film radiography and scanning equalization radiography for the visualization of various normal anatomic structures. Three observers analyzed image sets of posteroanterior chest radiographs of 10 healthy volunteers. Each observer rated relative visibility of normal anatomic structures. Statistical significance was evaluated with a one-tailed t test. Visibility with the digital images was significantly increased for all anatomic regions compared with dual-emulsion screen-film radiography. For 3 of 9 anatomic structures including the unobscured lung, observers indicated a significant increase in visibility with the selenium-based digital radiographs compared with scanning equalization radiographs. However, readers also indicated a significant decrease in visibility of 5 of 9 regions, including the mediastinum and the obscured lung, for the selenium-based images. Score for overall visibility was not significantly different between the digital and scanning equalization radiographs. Subjective visibility of normal anatomic structures in the thorax was significantly improved with selenium-based digital chest radiography compared with dual-emulsion screen-film chest radiography. Although the digital system was slightly inferior to the scanning equalization technique in visualization of the poorly penetrated regions, selenium-based digital chest radiography is promising especially for implementation of the picture archiving and communication system.

 In this paper, we present a new computer system to improve performance in telemedicine efforts by emphasizing high-quality video imaging. We apply digital mosaicing technique in computer graphics to automatically composite images, for the purpose of create wide high-resolution mosaics of the scene of the patient site, so as to permit doctors in hospital sites to perform telemedicine diagnosis more effectively.

 The radiation work is legally classified to harmful in Japan. And many health control systems for radiation workers are applied strictly. If we apply the health records registration system to the health control systems and involve them to the regional health care system, we can get more effective plan for regional economic development.

 This paper propose the national health records registration system for radiation workers from the historical study of the founding national radiation dose registration system.

 We developed a HIV/AIDS information network in Hokkaido University Hospital in order to make HIV/AIDS information public rapidly and to make it use effectively. The homepage of HIV/AIDS information, which consisted of two parts: one for medical staff and the other for public, was constructed. In 1997, the electronic HIV/AIDS-Consultation-Manual was published for medical staff in Hokkaido University Hospital through hospital LAN, as well as for those all over the country through UMIN (University Medical Information Network). This time, HIV/AIDS-Treatment-Manual as a new part was added to the homepage of HIV information for public. Contents of the homepage and structures of the system were introduced in this paper. In addition, the operational status and problem were reported according to the practical use of the system.