US 12,112,472 B2
Artifact removal from multimodality OCT images
Lampros Athanasiou, Medford (MA)
Assigned to Canon U.S.A., Inc., Melville, NY (US)
Filed by CANON U.S.A., INC., Melville, NY (US)
Filed on Oct. 13, 2021, as Appl. No. 17/500,583.
Prior Publication US 2023/0115191 A1, Apr. 13, 2023
Int. Cl. G06T 7/00 (2017.01); G06T 5/50 (2006.01); G06T 5/60 (2024.01); G06T 5/70 (2024.01)
CPC G06T 7/0012 (2013.01) [G06T 2207/10064 (2013.01); G06T 2207/10101 (2013.01); G06T 2207/20081 (2013.01); G06T 2207/20084 (2013.01); G06T 2207/20182 (2013.01); G06T 2207/30021 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A system, comprising:
a catheter configured to acquire a multimodality image of a biological lumen, wherein the multimodality image of the biological lumen includes optical coherence tomography (OCT) data co-registered with fluorescence data; and
an image processing device having a memory configured to store instructions that when executed by a processor, cause the processor to:
receive a plurality of B-scan frames of the OCT and fluorescence data of the multimodality image acquired by the catheter;
for the plurality of B-scan frames, calculate a parameter value of the fluorescence data for each B-scan frame;
sort the parameter values of the plurality of B-scan frames from lowest to highest and arrange the sorted parameter values along a parameter curve;
trace a straight line from the lowest value to the highest value of the parameter curve;
calculate a maximum perpendicular distance between the straight line and the parameter curve;
set the value along the parameter curve corresponding to the maximum perpendicular distance as a threshold value;
compare the fluorescence data values of each B-scan frame to the threshold value; and
for each B-scan frame detected to have a fluorescence data value equal to or higher than the threshold value, set that B-scan frame as a potential error frame.