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  • Karbalaie, Abdolamir,1975-KTH,Medicinteknik och hälsosystem,KTH, Medicinteknik och hälsosystem (author)

Image Enhancement Effect on Inter and Intra-observer Reliability of Nailfold Capillary Assessment

  • Article/chapterEnglish2018

Publisher, publication year, extent ...

  • Elsevier,2018
  • printrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:kth-231959
  • https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-231959URI
  • https://doi.org/10.1016/j.mvr.2018.06.005DOI
  • https://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-37163URI
  • http://kipublications.ki.se/Default.aspx?queryparsed=id:139517653URI

Supplementary language notes

  • Language:English
  • Summary in:English

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Classification

  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • QC 20180821
  • Background: Nailfold capillaroscopy (NC) is a diagnostic imaging technique that is used to assess the blood capillary network in the nailfold area. NC is routinely used for patients with microcirculation problems, such as systemic sclerosis and other connective tissue diseases.  Experts commonly use subjective evaluation as a reference point in images of nailfold video capillaroscopy, so it is important to reduce the inherent ambiguities in human judgment and diagnosis. Image quality is an important factor that affects measurement error and assessment time of NC images.Objective: In this study, a new image enhancement technique was introduced and evaluated subjectively.Methods: In total, 475 nailfold video capillaroscopy images from 18 healthy subjects and 41 systemic lupus erythematosus patients were used. The images were randomly divided into two sets, one each with 275 and 200. Eight independent observers who were familiar with the capillaroscopy technique participated in this study. The set of 275 images was evaluated by three observers with the forced–choice pairwise comparison method. Elliptic broken line (EBL) was used to count the number of capillaries. The intra- and inter-observer reliability of the original and enhanced images was evaluated on 200 images by five observers.Result: Except for eight images, all observers preferred the enhanced images in the visual quality comparison method. The intra-class correlation coefficient (ICC) of intra- and inter-observer reliability increased from 0.76-0.84 to 0.82-0.89, respectively, when using the enhancement method.Conclusion: By improving the image quality, more capillary details will be visible, and an observer can document more details that may not be visible in the original image and can do so more efficiently.

Subject headings and genre

  • Nailfold capillaroscopy; Image enhancement; Inter and intra-observer reliability; Capillary density; Systemic lupus erythematosus
  • Medical Technology
  • Medicinsk teknologi

Added entries (persons, corporate bodies, meetings, titles ...)

  • Etehadtavakol, MahnazIsfahan University of Medical Sciences, Isfahan, Iran,Medical Image and Signal Processing Research Cente (author)
  • Abtahi, Farhad,1981-Karolinska Institutet(Swepub:kth)u17ajigh (author)
  • Fatemi, AlimohammadRheumatology Section, Department of Internal Medicine, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran (author)
  • Emrani, ZahraMedical Image and Signal Processing Research Center, Isfahan University of Medical Sciences, Isfahan, Iran (author)
  • Erlandsson, Björn-ErikKTH,Skolan för kemi, bioteknologi och hälsa (CBH),KTH, Skolan för kemi, bioteknologi och hälsa (CBH)(Swepub:kth)u18de5q3 (author)
  • KTHMedicinteknik och hälsosystem (creator_code:org_t)

Related titles

  • In:Microvascular Research: Elsevier0026-28621095-9319

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