US 12,390,102 B2
Generating and evaluating two- and three-dimensional images of the interior of an eye
Utkarsh Sharma, Solon, OH (US)
Assigned to Alcon Inc., Fribourg (CH)
Filed by Alcon Inc., Fribourg (CH)
Filed on Oct. 5, 2022, as Appl. No. 17/938,187.
Claims priority of provisional application 63/281,453, filed on Nov. 19, 2021.
Prior Publication US 2023/0157536 A1, May 25, 2023
Int. Cl. A61B 3/10 (2006.01); A61B 3/00 (2006.01); A61F 9/008 (2006.01); G02B 26/10 (2006.01); G06T 7/13 (2017.01); G06T 7/60 (2017.01); G06T 7/73 (2017.01)
CPC A61B 3/102 (2013.01) [A61B 3/0058 (2013.01); A61F 9/008 (2013.01); G02B 26/101 (2013.01); G06T 7/13 (2017.01); G06T 7/60 (2013.01); G06T 7/73 (2017.01); G06T 2207/10101 (2013.01); G06T 2207/20216 (2013.01); G06T 2207/30041 (2013.01)] 23 Claims
OG exemplary drawing
 
23. An ophthalmic laser surgical system for imaging and treating a target in an eye, comprising:
an optical coherence tomography (OCT) device configured to:
direct an imaging beam along an imaging beam path towards the eye, the eye having an eye axis, the eye axis defining a z-axis, the z-axis defining a plurality of xy-planes within the eye, the target comprising a vitreous eye floater;
receive the imaging beam reflected from the eye;
generate three-dimensional (3D) image data from the reflected imaging beam; and
generate a plurality of two-dimensional (2D) enface images from the 3D image data by taking a slice of the 3D image data and summing, averaging, or projecting data of the slice to yield a 2D enface image, a 2D enface image imaging an xy-plane within the eye, the plurality of 2D enface images comprising at least one target enface image imaging the target in the eye and a retinal enface image imaging a retina of the eye, the retinal enface image showing a shadow cast by the target onto the retina;
a laser device configured to direct a laser beam along a laser beam path towards the target;
an xy-scanner configured to:
receive the imaging beam from the OCT device and direct the imaging beam along the imaging beam path towards the eye; and
receive the laser beam from the laser device and direct the laser beam along the laser beam path aligned with the imaging beam path towards the eye; and
a computer configured to:
compare the target of the target enface image and the shadow of the retinal enface image to confirm the presence of the target;
perform image processing on the target enface image to determine a feature of the target by:
performing image processing on the target enface image to identify an outline of the target and determining a size of the target from the outline of the target; and
performing image processing on the target enface image to identify an outline of the target and determining a shape of the target from the outline of the target;
track the target according to the target enface image imaging the target;
track the target by tracking the shadow cast by the target according to the retinal enface image;
overlay an outline of the target onto the target enface image;
overlay a no-fire zone onto the target enface image; and
generate a plurality of three-dimensional (3D) images from the 3D image data.