infrared imaging
Post on 03-Jan-2016
79 Views
Preview:
DESCRIPTION
TRANSCRIPT
Infrared imaging
Eugen Kvasnak, PhD. Department of Medical Biophysics and Informatics
3rd Medical Faculty of Charles University
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
Transmission principle
• IR laser tomography
Emission principle
IR photographythermography liquid crystalsthermovision - b&w
- colour thermovision camera - digital
IR imaging technique
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
Planck’s law Wien law
E = k.T4
Physical principles of thermovision
IR detector – semiconductor InSb - cooling by liquid N2 (-196o C)
Technical scheme of thermovision
Clinical aplication
Inflamatory proceses – joints, soft tissues
Phlebology – vein trombosis
Vascular cancer
Ischemy of the limbs
… Sudeck syndrom
Head zones
Thermoregulation
isothermal areas
37o 40o C
Thank you for your attention!
top related