Orthogonal polarization spectral imaging

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Orthogonal polarization spectral imaging
Purposeimaging small blood vessels

Orthogonal polarization spectral imaging (OPS imaging) is a method for imaging small blood vessels[1] in tissue like the nail bed or lip.

It uses a light source of

orthogonal (at a 90° angle) to the emitted light is recorded, thus eliminating direct reflections. The depolarized light forms an image of the microcirculation on a charge-coupled device (CCD), which can be captured through single frames or on videotape. The image produced is as if the light source is actually placed behind the desired target or transilluminated.[2]

It has been validated,[clarification needed] even under low hematocrit circumstances.[3]

References

  1. PMID 16555953
    .
  2. ^ "OPS Imaging". Cytometrics. Retrieved 2009-08-17.
  3. PMID 11893588
    .