First Author: H.Hasebe JAPAN
Co Author(s): H. Terashima N. Matsuoka E. Ueda R. Sasaki H. Yoshida T. Fukuchi
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Foveal hyper-reflective lesion (FHRL) is found in postoperative OCT image of surgically closed macular hole (MH). FHRL is considered to be correspondent with glial proliferation at fovea that accompanies MH closure. In this study, we used binarization technique for OCT images of surgically closed MH and tried to discriminate FHRL from surrounding normal retina more clearly.
Subjects were idiopathic MH patients who underwent primary vitrectomy at Niigata University Hospital. Postoperative OCT images of successfully closed MH were analyzed by ImageJ software (NIH, USA).
After binarization, FHRL had same brightness (white colour) as external limiting membrane, ellipsoid zone and outer plexiform layer, while surrounding outer nuclear layer showed black colour. We could confirm the existence of FHRL more distinctly than original images. Postoperative changes of FHRL were also examined more easily after binarization.
Binarization technique is useful to investigate FHRL in postoperative OCT images of surgically closed MH.