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Clinical video
Clinical video
Clinical video
Clinical video
Clinical video
Clinical video
Clinical video
Clinical video
Clinical video
Clinical video
Clinical video
Clinical video
Clinical video
Clinical video
Clinical video
Clinical video
Clinical video
Clinical video
Clinical video
Clinical video
Clinical video
Clinical video
Clinical video
Clinical video
Clinical video
Clinical video
Clinical video
Clinical video
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Clinical video

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Transcript

  • 1. Clinical Video 1
  • 2. Basic principles 2
  • 3. Basic principles • Keep it bright • Keep it big • Keep it straight • Keep it steady 3
  • 4. Keep it bright • Good light • Big lens/big sensor 4
  • 5. Good light • Modern gait analysis systems can cope with high light levels. • Natural light • Flourescent light • Special lights (halogen bulbs) 5
  • 6. Good camera £250 £1,900 3 x lens size 15 x Sensor 4 x Resolution 6 Test at correct shutter speed (1/125th second)
  • 7. Keep it big 7
  • 8. Keep it big 8
  • 9. Keep it big • Combination of camera distance and zoom setting. 9
  • 10. Keep it straight • Pure sagittal view • Pure coronal view • All determined by camera position 10
  • 11. Parallax 11 1.5m 5m 17° Direction of walking
  • 12. Parallax 12 1.5m 5m 8m 17° 11° Direction of walking
  • 13. Parallax 13 Distance form camera (metres) Parallax at 1.5m from centre of field of view 3 27° 4 21° 5 17° 6 14° 8 11° 10 9° 12 7°
  • 14. Parallax • Move back as far as possible (5-8m) • Zoom in so patient fills field of view • Ensure adequate lighting (the further back the camera is the more light will be required 14
  • 15. Keep it steady £30 15
  • 16. Setting up the room 16
  • 17. Minimal room size 17 8m 5m Walkway long enough for 8 to 10 strides (8m)
  • 18. Minimal room size 18 8m 5m Visible to camera (keep clean) Dead space Dead space
  • 19. Simultaneous with 3DGA 19 8m 5m
  • 20. Special effects 20
  • 21. Panning 21
  • 22. Zooming 22
  • 23. Split-screen 23
  • 24. Special effects Positive • Look good • Cover more walking • Capture turning • Use video screen efficiently Negative • Parallax effects • Technically more challenging • Requires additional person 24
  • 25. Clinical protocols 25
  • 26. Clinical protocols • The more of the patient you can see the more useful the video will be. • Minimal clothing • Good contrast in background and floor 26
  • 27. Conditions Once in bare-feet with minimal walking aids for reasonable walking (capacity) Once in normal footwear, splints and walking aids (performance) Other combinations that might be clinically meaningful. 27
  • 28. Views • Split screen • Full sagittal • Close up sagittal • Full coronal • Close up coronal 28

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