title: Functional evaluation of telemedicine with super high definition images and B-ISDN.
abstract: In order to determine whether a super high definition (SHD) image running at a series of 2048 resolution x 2048 line x 60 frame/sec was capable of telemedicine, we established a filing system for medical images and two experiments for transmission of high quality images were performed. All images of various types, produced from one case of ischemic heart disease were digitized and registered into the filing system. Images consisted of plain chest x-ray, electrocardiogram, ultrasound cardiogram, cardiac scintigram, coronary angiogram, left ventriculogram and so on. All images were animated and totaled a number of 243. We prepared a graphic user interface (GUI) for image retrieval based on the medical events and modalities. Twenty one cardiac specialists evaluated quality of the SHD images to be somewhat poor compared to the original pictures but sufficient for making diagnoses, and effective as a tool for teaching and case study purposes. The system capability of simultaneously displaying several animated images was especially deemed effective in grasping comprehension of diagnosis. Efficient input methods and creating capacity of filing all produced images are future issue. Using B-ISDN network, the SHD file was prefetched to the servers at Kyoto University Hospital and BBCC (Bradband ISDN Business chance & Culture Creation) laboratory as an telemedicine experiment. Simultaneous video conference system, the control of image retrieval and pointing function made the teleconference successful in terms of high quality of medical images, quick response time and interactive data exchange.
authors.affiliation: Department of Medical Information Science, Osaka University Hospital, Suita, Japan. takeda@hp-info.med.osaka-u.ac.jp
authors.forename: H
authors.initials: H
authors.lastname: Takeda
authors.forename: Y
authors.initials: Y
authors.lastname: Matsumura
authors.forename: T
authors.initials: T
authors.lastname: Okada
authors.forename: S
authors.initials: S
authors.lastname: Kuwata
authors.forename: M
authors.initials: M
authors.lastname: Komori
authors.forename: T
authors.initials: T
authors.lastname: Takahashi
authors.forename: K
authors.initials: K
authors.lastname: Minatom
authors.forename: T
authors.initials: T
authors.lastname: Hashimoto
authors.forename: M
authors.initials: M
authors.lastname: Wada
authors.forename: Y
authors.initials: Y
authors.lastname: Fujio
mesh_terms: D003195:Computer Communication Networks / Q000295:instrumentation*; D003196:Computer Graphics; D003199:Computer Systems; D005069:Evaluation Studies as Topic; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000295:instrumentation*; D008838:Microcomputers; D012815:Signal Processing, Computer-Assisted; D017216:Telemedicine / Q000295:instrumentation*