| Estimation of blood flow in the upper gastrointestinal tract by analysis of endoscopic true color images. | |
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MedLine Citation:
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PMID: 8591307 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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A method is presented that estimates the local blood flow in the mucosa of the organs of the upper gastrointestinal tract; the method is based on the analysis of endoscopic true-color images. The quantity of blood flow is approximated by the estimation of the hemoglobin concentration in the mucosa. The first step of our algorithm consists of a neural segmentation, which excludes artifacts of the images that interfere with further computation. Next, a transformation of the image data is performed within the RGB-color space in order to obtain an estimation of the blood distribution, which is independent of the local brightness in the images. Finally the quantity of blood flow is estimated on the basis of physical laws of reflectance spectroscopy. Our method is characterized by the following features: 1) It computes an estimation of the blood flow for a whole endoscopic image; as such it is more powerful than local measuring methods; 2) Our method does not need any modifications of the endoscopic equipment; and 3) The use of our method does not put any additional strain on the patient. |
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Authors:
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R S Jacoby; F M Zwiebel; R Herpers; K H Englmeier |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Medinfo. MEDINFO Volume: 8 Pt 1 ISSN: - ISO Abbreviation: Medinfo Publication Date: 1995 |
Date Detail:
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Created Date: 1996-04-01 Completed Date: 1996-04-01 Revised Date: 2008-07-10 |
Medline Journal Info:
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Nlm Unique ID: 7600347 Medline TA: Medinfo Country: CANADA |
Other Details:
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Languages: eng Pagination: 714-7 Citation Subset: IM |
Affiliation:
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Medical Clinic II, Klinik Charité, Alexander-Humboldt-Univ. Berlin, Schumannstrasse 20-22, D 10098 Berlin, F.R.G. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Color Digestive System / blood supply* Endoscopy, Gastrointestinal Gastric Mucosa / blood supply Gastroscopy* Humans Image Processing, Computer-Assisted* Regional Blood Flow Reproducibility of Results Signal Processing, Computer-Assisted |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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