US 11,937,878 B2
Systems and methods for high dynamic range optical coherence tomography angiography (HDR-OCTA)
Xiang Wei, Portland, OR (US); and Yali Jia, Portland, OR (US)
Assigned to OREGON HEALTH & SCIENCE UNIVERSITY, Portland, OR (US)
Filed by Oregon Health & Science University, Portland, OR (US)
Filed on Nov. 13, 2020, as Appl. No. 17/098,152.
Claims priority of provisional application 62/937,098, filed on Nov. 18, 2019.
Prior Publication US 2021/0145277 A1, May 20, 2021
Int. Cl. A61B 3/12 (2006.01); A61B 3/10 (2006.01); G06T 5/00 (2006.01); G06T 5/50 (2006.01)
CPC A61B 3/1233 (2013.01) [A61B 3/102 (2013.01); G06T 5/009 (2013.01); G06T 5/50 (2013.01); G06T 2207/10101 (2013.01); G06T 2207/20221 (2013.01); G06T 2207/30041 (2013.01); G06T 2207/30104 (2013.01)] 26 Claims
OG exemplary drawing
 
1. A method for optical coherence tomography angiography (OCTA) imaging, comprising:
obtaining three or more optical coherence tomography (OCT) B-scans at each of a plurality of cross-sectional positions along a slow axis using a stepped scanning pattern on the slow axis, wherein the obtaining the OCT B-scans includes:
obtaining a first OCT B-scan, a second OCT B-scan, and a third OCT B-scan at a first cross-sectional position of the cross-sectional positions, wherein a first time period between the first and second OCT B-scans is different than a second time period between the second and third OCT B-scans, and wherein a third time period between the first and third OCT B-scans is different than the first and second time periods; and
obtaining, via the stepped scanning pattern on the slow axis, at least one of the OCT B-scans at one or more other cross-sectional positions of the plurality of cross-sectional positions in between the first and second OCT B-scans or second and third OCT B-scans at the first cross-sectional position;
generating multiple OCTA images based on the three or more OCT B-scans at each of the plurality of cross-sectional positions; and
combining the multiple OCTA images to obtain a high dynamic range (HDR) OCTA image.