title: Imaging Laser-Induced Choroidal Neovascularization in the Rodent Retina Using Optical Coherence Tomography Angiography.
abstract: The purpose of this study was to evaluate the performance of optical coherence tomography angiography (OCTA) in visualizing laser-induced choroidal neovascularization (CNV) in the rodent retina.
  
  
  
  Choroidal neovascularization was induced via laser photocoagulation in 2 male Brown Norway rats and 2 male C57BL/6 mice. For qualitative comparison, the animals were imaged in vivo with OCTA, indocyanine green angiography (ICGA), and fluorescein angiography (FA), and ex vivo with immunofluorescence confocal microscopy, 14 days post laser photocoagulation without anti-vascular endothelial growth factor (anti-VEGF) intervention. For longitudinal quantitative analysis, CNV was induced in 6 additional male C57BL/6 mice. Three mice intravitreally received an anti-VEGF agent and the remaining 3 mice phosphate buffered saline (PBS) vehicle 7 days post laser photocoagulation. These animals were imaged using OCTA 6, 14, and 21 days post laser photocoagulation. The area and volume of the laser-induced CNV lesions were measured longitudinally.
  
  
  
  In both mice and rats, OCTA qualitatively showed high correlation with FA, ICGA, and immunofluorescence imaging. Unlike FA and ICGA, which does not show the microvasculature due to dye leakage, OCTA visualized the CNV microvasculature with resolution and contrast comparable to immunofluorescence images. Longitudinal imaging enabled normalization of the CNV area and volume, reducing inherent variation in the CNV size. By using only 3 mice in each group, statistically significant differences (P < 0.01) in the CNV area and volume could be demonstrated.
  
  
  
  Optical coherence tomography angiography enables noninvasive visualization of the laser-induced CNV microvasculature in the rodent retina with high resolution and tissue-lumen contrast, providing quantifiable in vivo measurements for longitudinal analysis.
authors.affiliation: Department of Mechanical Engineering Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Republic of Korea.
authors.forename: Jang Ryul
authors.initials: JR
authors.lastname: Park
authors.affiliation: Department of Mechanical Engineering Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Republic of Korea 2Information and Electronics Research Institute, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Republic of K.
authors.forename: WooJhon
authors.initials: W
authors.lastname: Choi
authors.affiliation: Department of Ophthalmology, Seoul National University College of Medicine, Seoul National University Bundang Hospital (SNUBH), Bundang-gu, Seongnam, Gyeonggi-do, Republic of Korea.
authors.forename: Hye Kyoung
authors.initials: HK
authors.lastname: Hong
authors.affiliation: Department of Mechanical Engineering Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Republic of Korea.
authors.forename: Yongjoo
authors.initials: Y
authors.lastname: Kim
authors.affiliation: Department of Ophthalmology, Seoul National University College of Medicine, Seoul National University Bundang Hospital (SNUBH), Bundang-gu, Seongnam, Gyeonggi-do, Republic of Korea.
authors.forename: Sang
authors.initials: S
authors.lastname: Jun Park
authors.affiliation: Graduate School of Nanoscience and Technology, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Republic of Korea.
authors.forename: Yoonha
authors.initials: Y
authors.lastname: Hwang
authors.affiliation: Graduate School of Nanoscience and Technology, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Republic of Korea.
authors.forename: Pilhan
authors.initials: P
authors.lastname: Kim
authors.affiliation: Department of Ophthalmology, Seoul National University College of Medicine, Seoul National University Bundang Hospital (SNUBH), Bundang-gu, Seongnam, Gyeonggi-do, Republic of Korea.
authors.forename: Se
authors.initials: S
authors.lastname: Joon Woo
authors.affiliation: Department of Ophthalmology, Seoul National University College of Medicine, Seoul National University Bundang Hospital (SNUBH), Bundang-gu, Seongnam, Gyeonggi-do, Republic of Korea.
authors.forename: Kyu
authors.initials: K
authors.lastname: Hyung Park
authors.affiliation: Department of Mechanical Engineering Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Republic of Korea.
authors.forename: Wang-Yuhl
authors.initials: WY
authors.lastname: Oh
mesh_terms: D000818:Animals; D002829:Choroid / Q000098:blood supply* / Q000473:pathology; D020256:Choroidal Neovascularization / Q000175:diagnosis* / Q000209:etiology; D004195:Disease Models, Animal; D005451:Fluorescein Angiography / Q000379:methods*; D005654:Fundus Oculi; D017075:Laser Coagulation / Q000009:adverse effects; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL; D018613:Microscopy, Confocal; D051381:Rats; D011914:Rats, Inbred BN; D012160:Retina / Q000473:pathology*; D055213:Retinal Pigment Epithelium / Q000473:pathology; D041623:Tomography, Optical Coherence / Q000379:methods*