منابع مشابه
Focusing The Fundus Camera: A Clinical Approach
Ophthalmic photography is a system of information transferral. In fundus photography, a visual description of the three-dimensional retinal and choroidal tissues is transferred to film. This twodimensional representation is used by the physician to make judgments concerning the health and treatment of the patient's retina. An accurate representation of the retinal and choroidal tissues is the g...
متن کاملBayer Filter Snapshot Hyperspectral Fundus Camera for Human Retinal Imaging.
PURPOSE To demonstrate the versatility and performance of a compact Bayer filter snapshot hyperspectral fundus camera for in-vivo clinical applications including retinal oximetry and macular pigment optical density measurements. METHODS 12 healthy volunteers were recruited under an Institutional Review Board (IRB) approved protocol. Fundus images were taken with a custom hyperspectral camera ...
متن کاملAbsolute blood velocity measured with a modified fundus camera.
We present a new method for the quantitative estimation of blood flow velocity, based on the use of the Radon transform. The specific application is for measurement of blood flow velocity in the retina. Our modified fundus camera uses illumination from a green LED and captures imagery with a high-speed CCD camera. The basic theory is presented, and typical results are shown for an in vitro flow...
متن کاملSimultaneous stereoscopic fundus camera incorporating a single optical axis.
The method of stereoscopic fundus photography, where both photographs are taken simultaneously, yields the most consistent and reproducible record of depths in the fundus. However, all systems devised to date have had undesirable photographic aberrations. For the most part, this has resulted because the optical axis of each image is not the same as that of the objective lens. A single-axis syst...
متن کاملA new fundus camera technique to help calculate eye-camera magnification: a rapid means to measure disc size.
OBJECTIVE To find a simple means for calculating eye-camera magnification to permit estimation of true retinal object size from a retinal photograph. METHODS The position of the focusing knob on 3 different retinal cameras (TRC-50F and TRC-50X; Topcon America Corp, Paramus, NJ; and the CR6-45NM Non-mydriatic Retinal Camera; Canon Inc, Tokyo, Japan) was measured during optic nerve photography ...
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ژورنال
عنوان ژورنال: JAPANES JOURNAL OF MEDICAL INSTRUMENTATION
سال: 1982
ISSN: 0385-440X,1881-4875
DOI: 10.4286/ikakikaigaku.52.8_401