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The challenge of comprehensive nailfold videocapillaroscopy practice: a further contribution


1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17

 

  1. Department of Internal Medicine, Hospital Clínico Universitario Lozano Blesa, Zaragoza, Spain. bcgracia@salud.aragon.es
  2. Software Engineer, Computer Science Graduate, University of Zaragoza, Spain.
  3. SEMIGEAS Group Coordinator, Department of Internal Medicine, Complejo Hospitalario de Navarra, Pamplona, Spain.
  4. Department of Internal Medicine, Hospital Universitario Miguel Servet, Zaragoza, Spain.
  5. Department of Internal Medicine, Hospital General Universitario La Paz, Madrid, Spain.
  6. Department of Internal Medicine, Hospital General Universitario La Paz, Madrid, Spain.
  7. Department of Internal Medicine, Hospital Universitario Parc Taulí, Sabadell, Barcelona, Spain.
  8. Department of Internal Medicine, Hospital Clínic, Barcelona, Spain.
  9. Department of Internal Medicine, Hospital La Fe, Valencia, Spain.
  10. Unit of Autoimmune Diseases, Department of Internal Medicine, Hospital Universitario Virgen de las Nieves, Granada, Spain.
  11. Unit of Autoimmune Diseases, Department of Internal Medicine, Hospital Universitario Virgen de las Nieves, Granada, Spain.
  12. Unit of Autoimmune Diseases, Department of Internal Medicine, Complejo Hospitalario Universitario de Santiago, Santiago de Compostela, Spain.
  13. Department of Internal Medicine, Hospital Clínico Universitario Lozano Blesa, Zaragoza, and Instituto de Investigación Sanitaria Aragon (IISA), Zaragoza, Spain.
  14. Unit of Autoimmune Diseases, Department of Internal Medicine, Hospital Universitario Vall d’Hebron, Barcelona, Spain.
  15. Unit of Autoimmune Diseases, Department of Internal Medicine, Hospital Universitario Vall d’Hebron, Barcelona, Spain.
  16. Unit of Autoimmune Diseases, Department of Internal Medicine, Hospital Universitario Vall d’Hebron, Barcelona, Spain.
  17. Unit of Autoimmune Diseases, Department of Internal Medicine, Hospital Universitario Vall d’Hebron, Barcelona, Spain.

CER15055
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PMID: 34936544 [PubMed]

Received: 03/08/2021
Accepted : 25/10/2021
In Press: 16/12/2021

Abstract

OBJECTIVES:
Although classification systems and scores for capillaroscopy interpretation have been published, there is a lack of homogenization for the procedure, especially in the way and place the images are taken, the counting of the capillaries and the measuring of their size. Our objective is to provide a deep learning-based software to obtain objective and exhaustive data for the whole nailfold without increasing the time or effort needed to do the examination, or requiring expensive equipment.
METHODS:
An automated software to count nailfold capillaries has been designed, through an exploratory image dataset of 2,713 images with 18,000 measurements of 3 different types. Subsequently, application rules have been created to detect the morphology of nailfold videocapillaroscopy images, through a training set of images. The software reliability has been evaluated with standard metrics used in the machine learning field for object detection tasks, comparing automatic and manual counting on the same NVC images.
RESULTS:
A mean average precision (mAP) of 0.473 is achieved for detecting and classifying capillaries and haemorrhages by their shape, and a mAP of 0.515 is achieved for detecting and classifying capillaries by their size. A precision of 83.84% and a recall of 92.44% in the identification of capillaries was estimated.
CONCLUSIONS:
Deep learning is a useful tool in nailfold videocapillaroscopy that allows to analyse objectively and homogeneously images taken with multiple devices. It should make the assessment of the capillary morphology in nailfold video capillaroscopy easier, quicker, more complete and accessible to everyone.

DOI: https://doi.org/10.55563/clinexprheumatol/6usce8

Rheumatology Article