| 词条 | Orthogonal polarization spectral imaging |
| 释义 |
| name = Orthogonal polarization spectral imaging | image = | alt = | caption = | pronounce = | purpose =imaging small blood vessels | test of = | based on = | synonyms = | reference_range = | calculator = | DiseasesDB = | ICD10 = | ICD9 = | ICDO = | MedlinePlus = | eMedicine = | MeshID = | OPS301 = | LOINC = }} Orthogonal polarization spectral imaging is a method for imaging small blood vessels[1] in tissue like the nail bed or lip. It uses a light source of linearly polarized light with a wavelength of 550 nanometers, an isosbestic point for hemoglobin, thus imaging the erythrocytes as they are flowing through the small blood vessels. The reflected light 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 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, even under low hematocrit circumstances.[3] References1. ^{{cite journal |vauthors=Cerný V, Turek Z, Parízková R |title=Orthogonal polarization spectral imaging |journal=Physiol Res |volume=56 |issue=2 |pages=141–7 |year=2007 |pmid=16555953 |doi= |url=http://www.biomed.cas.cz/physiolres/pdf/56/56_141.pdf}} {{Medical imaging}}2. ^{{cite web|url=http://www.cytometrics.com/ops.htm |title=OPS Imaging |accessdate=2009-08-17 |publisher=Cytometrics }} 3. ^{{cite journal|title=Validation of OPS imaging for microvascular measurements during isovolumic hemodilution and low hematocrits|journal=Am J Physiol Heart Circ Physiol|date=April 2002|first=AG|last=Harris|author2=Sinitsina I |author3=Messmer K. |volume=282|issue=4|pages=1502–9|pmid=11893588 |url=|format=|doi=10.1152/ajpheart.00475.2001 }} 1 : Medical imaging |
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