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[Determination of the circulation in the human retina using image analysis of video-angiograms].
Fortschr Ophthalmol. 1989; 86(2):111-4.FO

Abstract

A method is described to determine the total retinal blood flow. Intravenous fluorescence angiography is the clinical procedure used, together with digital image processing methods. Our system consists of a standard fundus camera, a highly sensitive sensor with a low-light-level intensifier (micro-channal plate) and a CCD, a computer system including a real-time memory, an image display subsystem, and other standard peripherals (disk, magtape, terminal, etc.). The recording speed is 100 frames (noninterlaced), the image size 256 X 256 pixels, and the depth 8 bit. In order to properly track the images against the patients eye movements, it is necessary to have absolutely sharp pictures. The fundus camera is therefore equipped with a stroboscopic bulb, which gives light pulses of 0.01 ms. The stroboscope is synchronized by the electronics of the camera. After recording the images, further evaluation is done.

Authors

Preussner PR
No affiliation info available
Richard G
No affiliation info available

MeSH

Blood Flow VelocityFluorescein AngiographyHumansImage Processing, Computer-AssistedRetinal ArteryRetinal DiseasesVideo Recording

Pub Type(s)

English Abstract
Journal Article

Language

ger

PubMed ID

2737572

Citation

Preussner, P R., and G Richard. "[Determination of the Circulation in the Human Retina Using Image Analysis of Video-angiograms]." Fortschritte Der Ophthalmologie : Zeitschrift Der Deutschen Ophthalmologischen Gesellschaft, vol. 86, no. 2, 1989, pp. 111-4.
Preussner PR, Richard G. [Determination of the circulation in the human retina using image analysis of video-angiograms]. Fortschr Ophthalmol. 1989;86(2):111-4.
Preussner, P. R., & Richard, G. (1989). [Determination of the circulation in the human retina using image analysis of video-angiograms]. Fortschritte Der Ophthalmologie : Zeitschrift Der Deutschen Ophthalmologischen Gesellschaft, 86(2), 111-4.
Preussner PR, Richard G. [Determination of the Circulation in the Human Retina Using Image Analysis of Video-angiograms]. Fortschr Ophthalmol. 1989;86(2):111-4. PubMed PMID: 2737572.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - [Determination of the circulation in the human retina using image analysis of video-angiograms]. AU - Preussner,P R, AU - Richard,G, PY - 1989/1/1/pubmed PY - 1989/1/1/medline PY - 1989/1/1/entrez SP - 111 EP - 4 JF - Fortschritte der Ophthalmologie : Zeitschrift der Deutschen Ophthalmologischen Gesellschaft JO - Fortschr Ophthalmol VL - 86 IS - 2 N2 - A method is described to determine the total retinal blood flow. Intravenous fluorescence angiography is the clinical procedure used, together with digital image processing methods. Our system consists of a standard fundus camera, a highly sensitive sensor with a low-light-level intensifier (micro-channal plate) and a CCD, a computer system including a real-time memory, an image display subsystem, and other standard peripherals (disk, magtape, terminal, etc.). The recording speed is 100 frames (noninterlaced), the image size 256 X 256 pixels, and the depth 8 bit. In order to properly track the images against the patients eye movements, it is necessary to have absolutely sharp pictures. The fundus camera is therefore equipped with a stroboscopic bulb, which gives light pulses of 0.01 ms. The stroboscope is synchronized by the electronics of the camera. After recording the images, further evaluation is done. SN - 0723-8045 UR - https://www.unboundmedicine.com/medline/citation/2737572/[Determination_of_the_circulation_in_the_human_retina_using_image_analysis_of_video_angiograms]_ DB - PRIME DP - Unbound Medicine ER -