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Laboratoire Angevin de Recherche en Ingénierie des Systèmes

Separated by coma

Slow Revofit Research Project


Group :  Information, Signal, Image and Life Sciences

Labelling: none

Duration: 24 months (2020 - 2022)

Funding: SAM network project

Staff involved from LARIS: Mickaël Dinomais, Jean-Baptiste Fasquel, Anne Humeau-Heurtier

Project partners: Sylvain Durand (EA 4334 MIP - Le Mans University), Yoann Ronzi (Reeducation Centre 'Les Capucins' – Angers), Romain Champagne (Hospital of Laval)


Lower limb amputation is not an uncommon situation. A poor adaptation of the prosthesis on the residual limb leads to minute "aberrant" movements of the prosthesis during walking and potentially to deformations of the prosthesis and of the limbs, potentially impacting the biomechanics of walking. These "anomalies" are not perceived by a visual clinical analysis of the gait nor by video with our classic cameras. The very recent ultra-fast cameras make it possible to produce "slow motion" videos with extreme slow motion, which can be used for a more detailed analysis of movements with applications in health and sport. As no data exists to know the relevance of this device in the analysis of movement in the fields mentioned, we thus propose to develop the analysis of walking via capture by ultra-fast camera within the framework of the Revofit™ protocol, the main objective of which is to evaluate the effect of the Revofit™ device on residual limb pain compared to the use of a conventional socket (without the Revofit™ system). Furthermore, it also appears necessary to define an image processing methodology in order to best objectify the differences in the recordings, quantitatively characterise the movement and facilitate the analysis routine.


The main objective is to analyse the contribution of a gait recording in an amputee (before/after intervention) by ultra-fast camera compared to an analysis via classic video and by Gait-ride system and to develop image analysis algorithms of these "ultra-ralentis" to objectify modifications. The secondary objectives are to evaluate the effect of the Revofit™ system compared to the use of a conventional socket in terms of:

  • pain and quality of life,
  • functional impact on walking,
  • patient satisfaction with the technical aid.