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AssigneeResearch Foundation of the City University of New York
InventorsRobert R. Alfano, Xiaohui Ni
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An optical technique to improve the imaging of a target inside suspensions of scattering particles includes the illumination of the scattering particles with circularly polarized light. The backscattered light from the host medium preserves the helicity of incident light, while the backscattered light reflected from the target is predominated with light of opposite helicity. Based on the observed helicity difference in the emerging light that originated at the target and that backscattered from the medium, the present optical technique improves the image contrast using circular polarization. This approach makes use of polarization memory which leads to the reflected light from the target accompanied by weak diffusive backscattered light. Using the present technique, improved imaging of the artery wall is achieved and plaque composition can be assessed through a blood field associated with the artery. The scattering from the particles, such as red blood cells, in the blood is reduced due to polarization memory. The present invention can be also applied to other biomedical application, as well as image targets through adverse environmental conditions, such as fog, clouds, smoke, murky water, etc.
A method for analyzing an object located in a turbid medium comprising the steps of:
A method for analyzing coronary lesions, such as vulnerable plaques inside the walls of the arteries, comprising the steps of:
An optical system for imaging a target located within a suspension of scattering particles that at least in part define a turbid medium comprising:
A system for imaging a target that is located within a turbid medium that is defined in part by a suspension of scattering elements that have a dimension (a) comprising:
Dependencies are inferred from the claim text.