SHOZO SONODA


Analysis of choroidal morphologic features using swept source OCT

 

SHOZO SONODA, MD, Ph.D.

Department of Ophthalmology, Kagoshima University Graduate School of Medical and Dental Sciences

  

Introduction of swept source OCT (SS-OCT) and enhanced depth image optical coherence tomography made us possible to collect quantitative morphological data on the choroid non-invasively and facilitate in diagnosing and treating patients such as AMD, VKH, CSC and DME.

 The architecture of the normal retina is well-organized so that it is relatively easy to detect pathological changes. The choroid is composed mainly of blood vessels and stroma without a well-organized architecture. This makes it very difficult to differentiate abnormal from normal choroid in the OCT images. To make the analyses of the choroid more quantitative, we have developed a new method to differentiate and measure the areas of the lumen and stroma of the choroid using binarizied images of OCT. initially the measurement based on the ImageJ which requires manual processing, therefore we have developed a software, named “EyeGround”, to perform this procedure semi-automatically using the Topcon SS-OCT. EyeGround enable us to analyze the areas of the choroidal thickness, the whole choroid, and the luminal and stromal parts of the choroid and also divide the choroid into strata based on the vascular structure. We will talk about the usefulness of this software for analysis of chorioretinal diseases.

  

1996     Graduated from Ehime University School of Medicine

1996     Resident, Department of Ophthalmology, Kagoshima University School of Medicine

2000     Graduated from Kagoshima University Graduate School of Medical and Dental Sciences

2000     Assistant Professor, Department of Ophthalmology, Kagoshima University School of Medicine

2007     Doheny Eye Institute, research fellow

2009     Assistant Professor, Department of Ophthalmology, Kagoshima University School of Medicine

2010     Senior Lecturer, Department of Ophthalmology, Kagoshima University School of Medicine