| Influence of Image Compression on the Interpretation of Optical Coherence Tomography in Diabetic Macular Edema. |
|
Sunah Kang, Young Suk Chang, Jong Woo Kim, Chul Gu Kim, Tae Gon Lee, Jae Hui Kim |
|
Department of Ophthalmology, Kim's Eye Hospital, Konyang University College of Medicine, Seoul, Korea. kjh7997@daum.net |
| 당뇨황반부종 환자에서 이미지 압축이 빛간섭단층촬영 결과 해석에 미치는 영향 |
|
강선아⋅장영석⋅김종우⋅김철구⋅이태곤⋅김재휘 |
|
Department of Ophthalmology, Kim’s Eye Hospital, Konyang University College of Medicine, Seoul, Korea |
|
|
| Abstract |
PURPOSE
To evaluate the influence of image compression on optical coherence tomography (OCT) images in eyes with diabetic macular edema (DME). METHODS: Twenty eyes of 30 patients diagnosed with DME were included in this retrospective observational case series. Horizontal OCT scans centered at the center of the fovea were conducted using spectral-domain OCT (Spectral OCT/SLO(R)). The images were exported to Tag Image File Format (TIFF) and then transformed to 10, 5, and 1 quality of Joint Photographic Experts Group (JPEG) format using Photoshop. OCT images were taken before and after intravitreal bevacizumab injection. The presence of intraretinal fluid, foveolar detachment, and photoreceptor inner segment/outer segment (IS/OS) disruption were evaluated in each image. RESULTS: The mean (+/- standard deviation) size of TIFF images and 10, 5 and 1 quality JPEG images were 1712.0, 183.3 +/- 6.8, 90.9 +/- 4.3, 42.8 +/- 1.4 kilobytes (KB), respectively, before the injection and 1712.0, 189.5 +/- 9.1, 94.9 +/- 5.6, 43.4 +/- 1.8 KB, respectively, after the injection. The presence of intraretinal fluid, foveolar detachment, and photoreceptor IS/OS disruption identified in TIFF images was also identified in the compressed JPEG images. CONCLUSIONS: Quality of retinal OCT image did not influence the estimation of DME despite the JPEG image being compressed to approximately 1/40 of the original TIFF image size. |
| Key Words:
Diabetic macular edema;Image compression;Optical coherence tomography |
|
PDF Links
Full text via DOI
Download Citation
