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Abstract #74256 Published in IGR 19-1
Volumetric Measurement of Optic Nerve Head Drusen Using Swept-Source Optical Coherence Tomography
Tsikata E; Verticchio Vercellin AC; Falkenstein I; Poon LY; Brauner S; Khoueir Z; Miller JB; Chen TCJournal of Glaucoma 2017; 26: 798-804
PURPOSE: To describe new software tools for quantifying optic nerve head drusen volume using 3-dimensional (3D) swept-source optical coherence tomography (SS-OCT) volumetric scans. MATERIALS AND METHODS: SS-OCT was used to acquire raster volume scans of 8 eyes of 4 patients with bilateral optic nerve head drusen. The scans were manually segmented by 3 graders to identify the drusen borders, and thereafter total drusen volumes were calculated. Linear regression was performed to study the relationships between drusen volume, retinal nerve fiber layer thickness, and Humphrey visual field mean deviation. RESULTS: In the 8 study eyes, drusen volumes ranged between 0.24 to 1.05 mm. Visual field mean deviation decreased by ∼20 dB per cubic millimeter increase in drusen volume, and the coefficient of correlation of the linear regression was 0.92. In this small patient series, visual field defects were detected when drusen volume was larger than about 0.2 mm. CONCLUSIONS: Software tools have been developed to quantify the size of OHND using SS-OCT volume scans.
*Department of Ophthalmology, Harvard Medical School †Massachusetts Eye and Ear, Boston, MA ‡University Eye Clinic, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Policlinico San Matteo, Pavia, Italy §Department of Ophthalmology, Kaohsiung Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Kaohsiung, Taiwan ∥Beirut Eye and Ear, Nose, and Throat Specialist Hospital, Beirut, Lebanon.
Full articleClassification:
6.9.2.2 Posterior (Part of: 6 Clinical examination methods > 6.9 Computerized image analysis > 6.9.2 Optical coherence tomography)
2.14 Optic disc (Part of: 2 Anatomical structures in glaucoma)
10 Differential diagnosis e.g. anterior and posterior ischemic optic neuropathy
6.6.2 Automated (Part of: 6 Clinical examination methods > 6.6 Visual field examination and other visual function tests)
