J Korean Ophthalmol Soc > Volume 60(11); 2019 > Article
Journal of the Korean Ophthalmological Society 2019;60(11):1050-1057.
DOI: https://doi.org/10.3341/jkos.2019.60.11.1050    Published online November 15, 2019.
Analysis of Choroidal Thickness and Vascular Density Using Optical Coherence Tomography Angiography after Laser Photocoagulation.
Dong Hun Song, Jung Min Park
Department of Ophthalmology, Maryknoll Medical Center, Busan, Korea. pjm1438@hanmail.net
레이저광응고술 전후 맥락막두께 변화와 빛간섭단층혈관조영술을 이용한 망막혈관 밀도 분석
송동훈 · 박정민
메리놀병원 안과
Correspondence:  Jung Min Park,
Email: pjm1438@hanmail.net
Received: 20 June 2019   • Revised: 19 July 2019   • Accepted: 24 October 2019
To evaluate the changes in choroidal thickness and superficial vascular density of the macula and optic disc using optical coherence tomography angiography after laser photocoagulation. METHODS: We conducted a retrospective chart review of 25 eyes of diabetic retinopathy patients who underwent panretinal photocoagulation. The macula and optic disc were divided into nine areas, and the vascular density of each area was quantitatively measured using optical coherence tomography angiography. The changes in vascular density and choroidal thickness were analyzed before laser photocoagulation and at 1 week after, 1 month after, and 3 months after treatment. RESULTS: In the panretinal photocoagulation group, the average vascular densities of the macula were 13.5 ± 3.6 mm⁻¹ before treatment, and 14.7 ± 3.1 mm⁻¹ after 1 week, 13.7 ± 2.6 mm⁻¹ after 1 month, and 12.8 ± 3.8 mm⁻¹ after 3 months of treatment. The average vascular densities of the optic disc were 14.7 ± 5.2 mm⁻¹ before treatment, and 14.1 ± 4.7 mm⁻¹ after 1 week, 14.8 ± 5.3 mm⁻¹ after 1 month, and 15.0 ± 4.7 mm⁻¹ after 3 months of treatment. The average subfoveal choroidal thicknesses were 327.5 ± 57.9 µm before treatment, and 334.4 ± 52.5 µm after 1 week, 291.2 ± 52.9 µm after 1 month, and 286.3 ± 44.4 µm after 3 months of treatment. CONCLUSIONS: The vascular density of the macula increased temporarily after 1 week of treatment but decreased afterwards. The vascular density of the optic disc decreased after 1 week of laser treatment but increased over time. The subfoveal choroidal thickness increased after 1 week of laser treatment but decreased afterwards.
Key Words: Optical coherence tomography angiography;Panretinal photocoagulation;Vascular density

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