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 13,001 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

During the Medicus field test we gained experience using the teleradiology system for almost daily teleconferences between a radiology department and clinics for internal medicine, urology, and gynecology. The existing system has a high degree of functionality. The full 12-bit data format is available using the DICOM protocol. A data security concept is implemented, ensuring data integrity, privacy and authentication of communication partners. This concept covers the areas of organization, technique, user training, and software implementation. A future system should be a general purpose radiology workstation covering viewing functionality, image manipulation, and digital archive access. Dedicated teleradiology features have to be a part. Specialized evaluation software, e.g. for dynamic MRI, should be integratable in a modular way. For data exchange with other systems and for the synchronization of teleconference sessions, the protocols should be independent of the network standard used (ISDN, Ethernet, ATM) and based on the DICOM protocol. Extensions of the existing standard are therefore necessary. Besides future technical developments, reimbursement for teleradiology must be accomplished.
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PMID:[Requirements for a teleradiology system. Experiences with the MEDICUS-2 field test]. 926 11

There have so far been few telemedical applications in orthopaedics. This experiment involved clinicians in three different locations, two in Helsinki and the third in Tampere, consulting one another simultaneously. We used an ATM network to transfer X-ray pictures, digitized by a 12-bit CCD scanner and archived in a central image server. The consultations between the clinicians and the examination of the patient were transmitted by a videoconferencing system using the ISDN. We found that telemedicine offers new possibilities in orthopaedics, for clinical work, for training and for research.
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PMID:Experimental telemedicine in orthopaedics. 937 53

Telesurgery requires a network with the following characteristics: reliability; acceptable end-to-end delay; the ability to transfer data from sources with widely different data rates; low data error rates. A wide range of network options is currently available and even more will be available shortly. It is concluded that for telesurgery ISDN is the best option at present. In the near future, as they become available commercially. ATM networks are likely to be preferable.
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PMID:Network options for wide-area telesurgery. 937 33

We set out to assess the influence of a teleradiology network on the relations between a general hospital and a 100 km distant university hospital in the context of neurosurgical emergencies, and compared a commercially available technology, N-ISDN (Narrowband Integrated Service/Digital Network), to an emerging technology, ATM (Asynchronous Transfer Mode). The evaluation was conducted using records of advice request calls and patient transfers. Three phases were considered: without teleradiology, with transfer of digitized images over N-ISDN at 64 kbps, and with an experimental ATM network at 10.5 Mbps with DICOM image transfers and videoconferencing. Additionally, staff meetings over ATM videoconferencing were set up. To assess the ATM service, we used log files and questionnaires, 108 advice requests were studied over a 18 month period. The average transmission time for one examination was 38 s with full DICOM image resolution over ATM, versus 150 s with 10:1 JPEG (Joint Photographic Expert Group) compression over N-ISDN. Up to 50% unnecessary patient transfers were avoided. Advice requests increased fourfold, and non-urgent advice requests increased from 0 to 21%. Despite the experimental configuration of the ATM network, the service gave satisfaction to all the physicians. Videoconferencing was unanimously regarded as a prominent tool to improve the quality of interaction. It was particularly useful for non-urgent cases and distant staff meetings. Teleradiology can improve the relations between hospitals through an increase of urgent and non-urgent advice requests. Asynchronous transfer mode is an efficient way for fast transfer of radiological examinations in DICOM format and for discussing them through high-quality videoconferencing.
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PMID:Influence of the teleradiology technology (N-ISDN and ATM) on the inter-hospital management of neurosurgical patients. 1039 10

In this paper, we describe the 'Telemedicine Benchmark' (TMB), which is a set of standard procedures, protocols and measurements to test reliability and levels of performance of data exchange in a telemedicine session. We have put special emphasis on medical imaging, i.e. digital image transfer, joint viewing and editing and 3D manipulation. With the TMB, we can compare the aptitude of different video conferencing software systems for telemedicine issues and the effect of different network technologies (ISDN, xDSL, ATM, Ethernet). The evaluation criteria used are length of delays and functionality. For the application of the TMB, a data set containing radiological images and medical reports was set up. Considering the Benchmark protocol, this data set has to be exchanged between the partners of the session. The Benchmark covers file transfer, whiteboard usage, application sharing and volume data analysis and compression. The TMB has proven to be a useful tool in several evaluation issues.
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PMID:The Telemedicine benchmark--a general tool to measure and compare the performance of video conferencing equipment in the telemedicine area. 1050 68

Interoperability allows telehealth equipment to interact to achieve predictable results. To address the need for telehealth interoperability, the Alberta Research Council has been working with the Alberta Health and Wellness organization in Canada, and others, to create guidelines and a facility for testing telehealth equipment for compliance with technical interoperability standards. The laboratory consists of two rooms (7 m x 7 m) in a new building. The rooms are wired with easy-to-configure copper and fibre networks for telephone, Switch-56, ISDN, ATM, wireless and satellite services. One room specializes in teleconsultation and tele-education, while the other has facilities for teleradiology and telemonitoring. The rooms are interconnected in order to perform interoperability tests between realtime and store-and-forward equipment. The laboratory was piloted in the summer of 1999.
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PMID:A laboratory for testing the interoperability of telehealth systems. 1097 11

In this article, we proposed a multifunctional telemedicine system supporting both telediagnosis and teleconsultation services. We attempted not only to insure that the implementation of this system satisfied most requirements, but also to evaluate the impact of the system. With regard to system architecture, we designed a unified multimedia database to store all types of data and used two kinds of network (ATM and ISDN) for different possible applications. As for data transmission, the REFRESH and PREFETCH mechanisms were implemented to enhance data transfer efficiency. A total of 1107 consultations employing the telemedicine system were performed during the past 3 years. This technology was used most frequently for radiology consultation (32.7%, n = 362) and ultrasonic examination (19.5%, n = 216). An evaluation of the impact on diagnosis (507 valid cases) indicated that the diagnosis in 80 cases (15.78%) were altered on the basis of second opinions from a medical center; and the number of patients transferred to the medical center was reduced from 24 (4.7%) to eight cases. Most of the rural-site physicians (97%) thought that they did benefit from specialists' experience and knowledge via the telemedicine system. Based on 431 valid questionnaires, the number of the patients with confidence in the telemedicine system at their local healthcare center increased from 72.6% to 87.5%. Overall, more than 90% of patients and physicians believed that the system was valuable and provided satisfactory services.
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PMID:Implementation and evaluation of a multifunctional telemedicine system in NTUH. 1131 72