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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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. - PowerPoint PPT Presentation

Transcript of Infrared imaging

Page 1: Infrared imaging

Infrared imaging

Eugen Kvasnak, PhD. Department of Medical Biophysics and Informatics

3rd Medical Faculty of Charles University

Page 2: Infrared imaging

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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Transmission principle

• IR laser tomography

Emission principle

IR photographythermography liquid crystalsthermovision - b&w

- colour thermovision camera - digital

IR imaging technique

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Technical thermography :

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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Planck’s law Wien law

E = k.T4

Physical principles of thermovision

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

Technical scheme of thermovision

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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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Thank you for your attention!