Invited Symposium: Computing in Surgical Pathology



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Telepathology in Internet: Real Time Image Transmission with Low Bandwidth Lines

Alfaro, L. (Hospital 9 de Octubre, Valencia, Spain)
Grech, J. (EEUU, University of New York, USA)
Garcia-Rojo, M. (Complejo Hospitalario Ciudad Real, Spain)
Moro, E. (Hospital El Escorial, Madrid, Spain)

Contact Person: Luis Alfaro (lalfaro@ctv.es)


Telepathology systems have reached enormous development and effectiveness. It is possible to transmit real time video sequences and even to interact with remote equipments. Nevertheless, these high quality systems use specific lines of high data transmission capacity, that limits its diffusion. The use of the Internet network as transmission media allows to extend almost any place and any pathologist of the world the telepathology system. The disadvantage to surpass is that Internet transmissions use in most cases lines of low capacity, generally of 33.6 Kb/s. For that reason we have developed a system of telepathology that tries to potentiate to the maximum the possibilities of transmission of images through conventional lines in Internet. The system uses sequences of static images, instead of video sequences, with a resolution of 640x480 pixels, that are compressed in real time to jpg format. These are updated based on the capacity of the line available. In optimal conditions an image refreshment every second is reached. Simultaneously to the transmission of images we have used two methods of communication between transmitter and receiver. For distant connections we used IRC (chat). And for local connections we used simultaneously, a second telephonic connection with voice. The software used is webcam32, a shareware program of low cost available in Internet, that transmits the images to a Web page, so the receiver watches them through its Internet browser, with no need of any additional software. We developed a CGI on a web page in order to interconnect simultaneously several cameras from different places. It allows establishing discussions through IRC, based on the images transmitted in real time.

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Presentation Number SAalfaro0464
Keywords: telepathology, pathology, video, training, internet

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Alfaro, L.; Grech, J.; Garcia-Rojo, M.; Moro, E.; (1998). Telepathology in Internet: Real Time Image Transmission with Low Bandwidth Lines. Presented at INABIS '98 - 5th Internet World Congress on Biomedical Sciences at McMaster University, Canada, Dec 7-16th. Invited Symposium. Available at URL http://www.mcmaster.ca/inabis98/rojo/alfaro0464/index.html
© 1998 Author(s) Hold Copyright