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Default options and social welfare: Opt in versus opt out KU Leuven University of Antwerp

Hans Degryse
We offer a social-welfare comparison of the two most prominent default options - opt in and opt out - using a two-period model of localized competition. We demonstrate thatwhen consumers stick to the default option, the prevailing default policy shapes firms' ability to collect and use customer information, and affects their pricing strategy and entry decision differently.The free-entry analysis reveals that fewer firms enter under opt out as ...

"I don't opt out of things because I think I will get a sore knee, but I don't expose myself to stupid risks either" Vrije Universiteit Brussel

Annette Heijne, Karin Grävare Silbernagel, Mari Karin Elisabeth Lundberg

PURPOSE: The purpose of this qualitative study was to describe women's experiences with anterior cruciate ligament reconstruction (ACLR) and a subsequent ACL rupture, and to identify potential facilitators and barriers for coping with rehabilitation after the second injury.

METHODS: Eight women between 17 and 36 years (mean 26, SD 6.5) who had experienced ACLR, followed by another ACL rupture, participated in the study. Semi-structured ...

Geometric Calibration of an OCT Imaging System KU Leuven

Mouloud Ourak
© 2018 IEEE. This paper deals with an OCT (optical coherence tomography) geometric calibration method. OCT medical imaging system has received a growing interest during the last two decades. In medical purposes, OCT images are generally called optical biopsies which allows in-vivo investigation almost similar to a histopathological study. The physician can rely on the OCT images to establish a rapid and direct diagnosis. But the OCT images ...

A method for quantifying limbal stem cell niches using OCT imaging Vrije Universiteit Brussel University of Antwerp

Michel Haagdorens, Josephine Agnes Behaegel, Jos Rozema, Veerle Van Gerwen, Sofie Michiels, Sorcha Ní Dhubhghaill, Marie José Tassignon, Nadia Zakaria

Aims To evaluate the efficacy of Fourier domain-optical coherence tomography (FD-OCT) in imaging and quantifying the limbal palisades of Vogt and to correlate these images with histological findings. Methods The superior and inferior limbal region of both eyes of 50 healthy volunteers were imaged by FD-OCT. Images were processed and analysed using Matlab software. In vitro immunofluorescent staining of a cadaveric donor limbus was analysed to ...

Quantification of changes in foveal capillary architecture caused by idiopathic epiretinal membrane using OCT angiography Vrije Universiteit Brussel

Pieter Jan Nelis, Florian Alten, Christoph R Clemens, Peter Heiduschka, Nicole Eter

PURPOSE: To quantify the extent and depth of distortion of the foveal capillary architecture due to traction of an idiopathic epiretinal membrane (ERM) using optical coherence tomography angiography (OCT-A).

METHODS: Multimodal imaging including OCT-A (Angiovue, Optovue) was performed in 42 eyes with idiopathic ERM (72.4 years ±6.8). Best corrected visual acuity (BCVA), OCT-A vessel density of the foveal (VDfo) and parafoveal (VDp) ...

OCT for bifurcation stenting: what have we learned? KU Leuven

Tom Adriaenssens
Treatment of bifurcation lesions by percutaneous coronary intervention (PCI) shows major variation in complexity. Intravascular optical coherence tomography (OCT) provides high-resolution images of the pathoanatomy, thrombus, wires and stent positions during the procedure. This information may prove crucial in optimising PCI results and clinical outcomes after complex bifurcation treatment. Mounting evidence confirms the feasibility of OCT in ...

Real-time intraoperative OCT imaging of the vitreolenticular interface during pediatric cataract surgery University of Antwerp

Jan Van Looveren, Philip Plaeke, Luc Van Os, Marie-Jose Tassignon
Purpose: To report on the use of intraoperative optical coherence tomography (OCT) imaging of the vitreolenticular interface (VLI) during pediatric cataract surgery and to determine the incidence of VLI dysgenesis and surgical difficulties. Setting: Department of Ophthalmology, Antwerp University Hospital, Edegem, Belgium. Design: Retrospective cohort study. Methods: This study included 51 pediatric patients who underwent cataract surgery ...

Relevance of retinal thickness changes in the OCT inner and outer rings to predict progression to clinical macular edema University of Antwerp

Stela Vujosevic, Monica Varano, Catherine Egan, Sobha Sivaprasad, Geeta Menon, Ali Erginay, Frank D. Verbraak, Henrik Lund-Andersen, Jose P. Martinez, Ignasi Juergens, et al.
Purpose: To characterize the relevance of macular thickness changes in the inner and outer rings in the progression of macular edema in eyes/patients with diabetes type 2. Methods: A total of 374 type 2 diabetic patients with mild nonproliferative diabetic retinopathy (ETDRS levels 20-35) were included in a 12-month prospective observational study to identify retinopathy progression. Retinal thickness analyses were performed in 194 eyes/patients ...

Towards Real-time Estimation of a Spherical Eye Model based on a Single Fiber OCT KU Leuven

Mouloud Ourak, Gianni Borghesan, Dominiek Reynaerts, Emmanuel Vander Poorten
Depth perception remains a key challenge in vitreoretinal surgery. Currently users only have the view from an overhead stereo-microscope available, but this means of visualisation is quite restrictive. Optical Coherence Tomography (OCT) has been introduced in the past and is even integrated in a number of commercial systems to provide a more detailed depth vision, even showing subsurface structures up to a few millimeters below the surface. The ...