Catheter Based 3-D Defocusing Imaging
OwnerMortez Gharib, Jian Lu +1inventors
InventorsMortez Gharib, Jian Lu, David Jeon
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Abstract
A catheter based defocusing imaging system for 3-D tomography reconstruction of endovascular features of interest is disclosed. Without limitation, target sites for imaging include heart valves, calcified heart valves, calcium plastered valve on the heart valve or plaque on the inner wall of the blood vessel of a patient.
Claims22
A catheter based defocusing imaging system comprising:
- a fiber optic bundle received within an elongate catheter body;
- at least one of a mirror or a prism positioned to pass light to or from the fiber optic bundle at an angle;
- and
- the fiber optic connected to pass light to a sensor through an aperture mask including a plurality of apertures offset for defocusing imaging.
A method for catheter based 3-D imaging, comprising:
- positioning an imaging catheter within a subject adjacent a target surface;
- projecting light onto the surface through at least some blood;
- receiving, through the blood, a reflected image signal of the projected light from the surface;
- transmitting the reflected image signal through a fiber optical bundle in the catheter;
- capturing a portion of the reflected image signal with a sensor masked by a plurality of apertures, wherein at least one of the apertures is offset from a central axis of the catheter;
- and
- determining 3-D information for the surface by comparison of the captured portion of the reflected image signal.
The method of claim 21, wherein a conical mirror is used so that the captured image signals cover 360 degrees around the surface, and no camera pose determination is performed.
Dependencies are inferred from the claim text.