Temporary morphological changes in plus disease induced during contact digital imaging
Por:
Zepeda-Romero L.C., Martinez-Perez M.E., Ruiz-Velasco S., Ramirez-Ortiz M.A., Gutierrez-Padilla J.A.
Publicada:
1 oct 2011
Resumen:
Objective: To compare and quantify the retinal vascular changes induced by non-intentional pressure contact by digital handheld camera during retinopathy of prematurity (ROP) imaging by means of a computer-based image analysis system, Retinal Image multiScale Analysis. Methods: A set of 10 wide-angle retinal pairs of photographs per patient, who underwent routine ROP examinations, was measured. Vascular trees were matched between 'compression artifact' (absence of the vascular column at the optic nerve) and 'not compression artifact' conditions. Parameters were analyzed using a two-level linear model for each individual parameter for arterioles and venules separately: integrated curvature (IC), diameter (d), and tortuosity index (TI). Results: Images affected with compression artifact showed significant vascular d (P<0.01) changes in both arteries and veins, as well as in artery IC (P<0.05). Vascular TI remained unchanged in both groups. Conclusions: Non-adverted corneal pressure with the RetCam lens could compress and decrease intra-arterial diameter or even collapse retinal vessels. Careful attention to technique is essential to avoid absence of the arterial blood column at the optic nerve head that is indicative of increased pressure during imaging. © 2011 Macmillan Publishers Limited All rights reserved.
Filiaciones:
Zepeda-Romero L.C.:
Retinopathy of Prematurity Clinic, O.P.D. Hospital Civil de Guadalajara, Universidad de Guadalajara, Guadalajara, Jalisco 44280, Mexico
Martinez-Perez M.E.:
Univ Nacl Autonoma Mexico, Inst Res Appl Math & Syst, Dept Comp Sci, Mexico City 04510, DF, Mexico
Ruiz-Velasco S.:
Univ Nacl Autonoma Mexico, Inst Res Appl Math & Syst, Dept Stat & Probabil, Mexico City 04510, DF, Mexico
Ramirez-Ortiz M.A.:
Ophthalmology Division, Hospital Infantil de Mexico Federico Gomez, Mexico City, Mexico
Gutierrez-Padilla J.A.:
Department of Neonatology, Universidad de Guadalajara, O.P.D. Hospital Civil de Guadalajara, Guadalajara, Mexico
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