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Open Access Green as soon as Postprint is submitted to ZB.
Blood flow estimation in gastroscopic true-color images.
Proc. SPIE 2433, 87-98 (1995)
The assessment of blood flow in the gastrointestinal mucosa might be an important factor for the diagnosis and treatment of several diseases such as ulcers, gastritis, colitis or early cancer. The quantity of blood flow is roughly estimated by computing the spatial hemoglobin distribution in the mucosa. The presented method enables a practical realization by calculating approximately the hemoglobin concentration based on a spectrophotometric analysis of endoscopic true-color images, which are recorded during routine examinations. A system model based on the reflectance spectroscopic law of Kubelka-Munk is derived which enables an estimation of the hemoglobin concentration by means of the color values of the images. Additionally, a transformation of the color values is developed in order to improve the luminance independence. Applying this transformation and estimating the hemoglobin concentration for each pixel of interest, the hemoglobin distribution can be computed. The obtained results are mostly independent of luminance. An initial validation of the presented method is performed by a quantitative estimation of the reproducibility.
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Publication type
Article: Journal article
Document type
Scientific Article
Keywords
Blood Flow ; Color Image Analysis ; Distribution Of Hemoglobin ; Endoscopic True-color Images ; Reflectance Spectrophotometry
ISSN (print) / ISBN
0277-786X
e-ISSN
1996-756X
Journal
Proceedings of SPIE
Quellenangaben
Volume: 2433,
Pages: 87-98
Publisher
SPIE
Reviewing status
Peer reviewed
Institute(s)
Department for Medical Information Systems (MEDIS)