Infrared imaging

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Infrared imaging
Eugen Kvasnak, PhD. Department of Medical
Biophysics and Informatics 3rd Medical Faculty of
Charles University
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Herschel 1800 - thermal radiation of the
sun IR radiation - longer wavelength than
light - mostly heat effects - invisible, not
ionizing
near IR 0,8 25 µm - medical
applications far IR 25 µm 1 mm meteorology,
astronomy
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IR imaging technique
Emission principle IR photography thermography
liquid crystals thermovision - bw
- colour thermovision camera
- digital

• Transmission principle
• IR laser tomography

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• Technical thermography
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  noktovision, meteorology
• Medical thermography thermovision
• Noninvasive detection of human body energy
• Recording of body surface distribution of
  temperatures
• no radiation

X thermometry point temperature recording
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Physical principles of thermovision
E k.T4
Plancks law Wien law
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Technical scheme of thermovision
IR detector semiconductor InSb - cooling by
liquid N2 (-196o C)
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Clinical aplication
Inflamatory proceses joints, soft tissues
Phlebology vein trombosis Vascular
cancer Ischemy of the limbs Sudeck
syndrom Head zones
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Thermoregulation
isothermal areas
37o 40o C
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