US 9,808,152 B2
Anterior ocular segment optical coherence tomographic imaging device and anterior ocular segment optical coherence tomographic imaging method
Keiichiro Okamoto, Nagoya (JP); Risa Higashita, Nagoya (JP); Fushi Li, Nagoya (JP); and Makoto Kojima, Nagoya (JP)
Assigned to Tomey Corporation, Nagoya-Shi (JP)
Filed by Tomey Corporation, Nagoya-shi (JP)
Filed on Jun. 10, 2016, as Appl. No. 15/179,511.
Claims priority of application No. 2015-117991 (JP), filed on Jun. 11, 2015.
Prior Publication US 2016/0360962 A1, Dec. 15, 2016
Int. Cl. A61B 3/14 (2006.01); A61B 3/00 (2006.01); A61B 3/117 (2006.01); A61B 3/10 (2006.01); G06T 7/12 (2017.01)
CPC A61B 3/1176 (2013.01) [A61B 3/0025 (2013.01); A61B 3/102 (2013.01); A61B 3/117 (2013.01); A61B 3/14 (2013.01); G06T 7/12 (2017.01); G06T 2207/10101 (2013.01); G06T 2207/30041 (2013.01)] 12 Claims
OG exemplary drawing
 
1. An anterior ocular segment optical coherence tomographic imaging device for taking a tomographic image of an anterior ocular segment including a crystalline lens of a subject's eye using optical coherence, the device comprising a layer boundary detector configured to calculate brightness gradients from brightness values in a depth direction of the tomographic image from a cornea to a retina, detect an edge that is larger than a predetermined threshold, and identify a boundary of each layer of the crystalline lens from position of the edge, and trace boundary faces between a crystalline lens front surface and a cortex lentis, between a crystalline lens back surface and the cortex lentis, and between the nucleus lentis and the cortex lentis in the tomographic image.