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Diagnostic MDCT imaging requires a considerable number of images to be read. Moreover, the doctor who
diagnoses a medical image is insufficient in Japan. Because of such a background, we have provided diagnostic
assistance methods to medical screening specialists by developing a lung cancer screening algorithm that automatically
detects suspected lung cancers in helical CT images, a coronary artery calcification screening algorithm that
automatically detects suspected coronary artery calcification and a vertebra body analysis algorithm for quantitative
evaluation of osteoporosis. We also have developed the teleradiology network system by using web medical image
conference system. In the teleradiology network system, the security of information network is very important subjects.
Our teleradiology network system can perform Web medical image conference in the medical institutions of a remote
place using the web medical image conference system. We completed the basic proof experiment of the web medical
image conference system with information security solution. We can share the screen of web medical image conference
system from two or more web conference terminals at the same time. An opinion can be exchanged mutually by using a
camera and a microphone that are connected with the workstation that builds in some diagnostic assistance methods.
Biometric face authentication used on site of teleradiology makes "Encryption of file" and "Success in login" effective.
Our Privacy and information security technology of information security solution ensures compliance with Japanese
regulations. As a result, patients' private information is protected. Based on these diagnostic assistance methods, we have
developed a new computer-aided workstation and a new teleradiology network that can display suspected lesions
three-dimensionally in a short time. The results of this study indicate that our radiological information system without
film by using computer-aided diagnosis workstation and our teleradiology network system can increase diagnostic speed,
diagnostic accuracy and security improvement of medical information.
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