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Infrared imaging - PowerPoint PPT Presentation


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Infrared imaging. Eugen Kvasnak, PhD. Department of Medical Biophysics and Informatics 3rd Medical Faculty of Charles University. Herschel 1800 - thermal radiation of the sun I R radiation - longer wavelength than light - mostly heat effects - invisible , n ot ioniz ing.

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slide1

Infrared imaging

Eugen Kvasnak, PhD.

Department of Medical Biophysics and Informatics

3rd Medical Faculty of Charles University

slide2

Herschel 1800 - thermal radiation of the sun

IRradiation - longer wavelength than light

-mostly heat effects

- invisible, not ionizing

nearIR 0,8 – 25 μm - medical applications

far IR 25 μm – 1 mm – meteorology, astronomy

slide3

IR imaging technique

Emission principle

IR photography

thermography

liquid crystals

thermovision- b&w

- colourthermovision camera

- digital

  • Transmission principle
  • IR laser tomography
slide4

Technical thermography :

  • noktovision, meteorology
  • Medicalthermography – thermovision:
  • Noninvasive detection of human body energy
  • Recording of body surface distribution of temperatures
  • no radiation

X thermometry – point temperature recording

slide5

Physical principles of thermovision

E = k.T4

Planck’s law Wien law

slide6

Technical scheme of thermovision

IR detector – semiconductor InSb - cooling by liquid N2(-196o C)

slide7

Clinical aplication

Inflamatory proceses – joints, soft tissues

Phlebology – vein trombosis

Vascular cancer

Ischemyof the limbs

… Sudeck syndrom

Head zones

slide8

Thermoregulation

isothermalareas

37o 40o C