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Counting Capillaries in Nailfold Capillaroscopy:State of the Art and a Proposed Method
KTH, School of Technology and Health (STH). (Människa och kommunikation)ORCID iD: 0000-0001-7320-2306
(Department of Rheumatology, Alzahra Hospital, Isfahan University of Medical Sciences, 8174675731, Isfahan, Iran)ORCID iD: 0000-0003-3793-7449
(Medical Image and Signal Processing Research Center, Isfahan University of Medical Sciences, 81745-319 Isfahan, Iran)
(Department of Clinical Science, Intervention and Technology, Karolinska Institute (KI), Stockholm, Sweden)ORCID iD: 0000-0001-7807-8682
Show others and affiliations
2016 (English)In: IECBES 2016 - IEEE-EMBS Conference on Biomedical Engineering and Sciences, Institute of Electrical and Electronics Engineers (IEEE), 2016, 170-174 p., 7843437Conference paper, (Refereed)
Abstract [en]

Capillaries play a crucial role in the microcirculatorysystem by exchanging metabolic substrates and wasteproducts between blood and various tissues. The behavior ofcapillaries is affiliated with the number of capillaries per unitvolume of tissue. Among the various noninvasive techniques availablefor analyzing skin microcirculation, nailfold capillaroscopyis considered to be a simple and easy-to-perform technique thatallows a direct in-vivo visualization of the capillary network.Capillary density is one of the most important parameters in thestudies involving capillaroscopy images. Capillary density in mostof studies is defined as the number of capillaries in one millimeterspan of the distal row in each finger or toe. This definition issilent about counting or excluding the number of capillary withdifferent shapes. However, there is no single standard for countingthe number of capillaries in a span of one millimeter. In thispaper, a novel method is proposed for determining the nailfoldcapillary density. This method is a modified combination of twoexisting techniques: the direct observation and the 90◦ method.Compared to the two existing approaches, the proposed methodis more straightforward and easy to use for cases in which thecapillaries have different shapes and sizes. Through differentexamples, we have shown how this method can be used to selectthe apex point of capillary and subsequently count the numberof capillaries with several papillae.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2016. 170-174 p., 7843437
Series
IEEE EMBS Conference on Biomedical Engineering and Sciences, ISSN 2374-3220
Keyword [en]
Childhood Rheumatic-Diseases, Systemic-Sclerosis, Density, Ulcers, Skin
National Category
Medical and Health Sciences
Research subject
Applied Medical Technology
Identifiers
URN: urn:nbn:se:kth:diva-203314DOI: 10.1109/IECBES.2016.7843437ISI: 000400605700035Scopus ID: 2-s2.0-85015704316ISBN: 978-1-4673-7792-8 (print)ISBN: 978-1-4673-7791-1 (electronic)OAI: oai:DiVA.org:kth-203314DiVA: diva2:1082025
Conference
2016 IEEE-EMBS Conference on Biomedical Engineering and Sciences, IECBES 2016, Pullman Hotel and ResortsKuala Lumpur, Malaysia, 4 December 2016 through 8 December 2016
Note

QC 20170316

Available from: 2017-03-15 Created: 2017-03-15 Last updated: 2017-06-07Bibliographically approved

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Publisher's full textScopushttp://ieeexplore.ieee.org/document/7843437/

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Karbalaie, AbdolamirFatemi, AlimohammadAbtahi, FarhadEmrani, ZahraErlandsson, Björn-Erik
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