High resolution diffuse optical tomography using short range indirect imaging
AssigneesCarnegie Mellon University, William Marsh Rice University
InventorsSrinivasa Narasimhan, Chao Liu, Ashutosh Sabharwal, Akash K. Maity, Artur Dubrawski
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Abstract
A fast imaging apparatus and method for high resolution diffuse optical tomography with a line imaging and illumination system is disclosed. The method uses an algorithm comprising a convolution approximation of the forward heterogeneous scattering model that can be inverted to produce deeper than ever before structured beneath the surface. The method can detect reasonably accurate boundaries and relative depth of absorption variations up to a depth of approximately 8 mm below highly scattering medium such as skin.
Claims7
An apparatus comprising:
- a laser projector;
- and
- a camera, the laser projector and camera being in a verged epipolar configuration forming a camera-projector pair;
- wherein the laser projector is scanned through a series of discrete epipolar planes of the camera-projector pair, each epipolar plane illuminating a line on a surface of a medium, each epipolar plane having a different slope with respect to the surface of the medium;
- wherein the camera is synchronized with the laser projector such that a line of pixels on a camera image plane are exposed, the exposed line of pixels imaging a line on the surface of the medium at a fixed offset from the currently-illuminated line on the surface of the medium;
- and
- wherein an interpolation is performed over the series of discrete epipolar planes to form a short-range indirect image.
Dependencies are inferred from the claim text.