thermography

• the lower the temperature 


  the longer the peak wavelength
• Wien's Law 


  objects of different temperatures emit spectra that peak at different wavelengths
• Stefan's Law

  the intensity of the thermal radiation emitted by matter in terms of that matters temperature
• emissivity 


  how near the surface is to being a perfect "black body radiator", e=1 is perfect
• e=0

  poor heat radiating surface, usually white
• human skin

  e=0.97
• aural thermoscan 


  measures core body temperature
• aural thermoscans can monitor surface temperature by measuring 


  variations in peak wavelength across the surface of the patient (spectral measurement) and variations in the rate of heat radiation across the body (bolometric measurement)
• thermogram

  used to identify areas of inflammation
• specificity

  the ability of a test to correctly identify people without the disease
• sensitivity 


  the ability of a test to correctly identify patients with a disease
• spectral measurement 


  variations in peak wavelength across the surface of the patient
• bolometric measurement


  variations in the rate of heat radiation across the body