Tele-Echo System Remote medical care system

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Tele-Echo SystemRemote medical care system

• Toshiyuki Umeda
• Nara Institute of Science and Technology , JAPAN

toshiy-u_at_is.aist-nara.ac.jp
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Overview

• What we aim
• System overview
• What we achieved
• Future challenges

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Our Goal

• Provide remote medical care system
• with an ultrasonic echo system
• with viewing patients
• without geographical limitations

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System Overview
Diagnosis Site
Measurement Site
Satellite-GW
Satellite-GW
Encoder-WS
Decoder-WS
Switch
Patient Image
Ultrasound Image
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Satellite Network

• Easy to make a high speed line
• Easy to make a dedicated line
• Easy to make an international line

• A time lag occurred (say later)
• Relatively expensive (3 per min)

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Coverage Area
Coverage Area (JC-SAT1)
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Technical Aspects(Transmission)

• 2Mbps Satellite point-to-point Link
• RTT 500ms
• achievable max. throughput 1.77Mbps
• packet loss rate less than 0.1 (IP level)
• bit error rateless than 0.01
  (Physical level)

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Technical Aspects(Imaging System)

• MPEG-1 real-time encoder/decoder
• NTSC input/output
• 1.544 Mbps stream
• performance
• encoder overhead 3sec
• decoder overhead 1sec

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What We Achieved

• Transmitting ultrasonic echo images with
  sufficient quality from the measurement site to
  the diagnosis site.

• Video
• Quality of ultrasonic image after transmission

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Conclusion

• Two kinds of Noise
• Converting NTSC into MPEG-1
• Transmitting on satellite network

• System Requirement
• Real-time MPEG-1 Encoder/Decoder
• Dedicated line (Satellite or Telephone)

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Future Challenges

• International remote medical care system
• Higher quality ultrasonic images
• Remote medical care system

on World Wide Network