Memorias de investigación
Research Publications in journals:
EVA: Laparoscopic instrument tracking based on endoscopic video analysis for psychomotor skills assessment

Research Areas
  • Information technology and adata processing

INTRODUCTION: The EVA (Endoscopic Video Analysis) tracking system ? a new tracking system for extracting motions of laparoscopic instruments based on non-obtrusive video tracking was developed. The feasibility of using EVA in laparoscopic settings has been tested in a box trainer setup. METHODS: EVA makes use of an algorithm that employs information of the laparoscopic instrument's shaft edges in the image, the instrument's insertion point, and the camera?s optical centre to track the 3D position of the instrument tip. A validation study of EVA comprised a comparison of the measurements achieved with EVA and the TrEndo tracking system. To this end, 42 participants (16 novices, 22 residents, and 4 experts) were asked to perform a peg transfer task in a box trainer. Ten motion-based metrics were used to assess their performance. RESULTS: Construct validation of the EVA has been obtained for seven motion-based metrics. Concurrent validation revealed that there is a strong correlation between the results obtained by EVA and the TrEndo for metrics such as path length (?=0,97), average speed (?=0,94) or economy of volume (?=0,85), proving the viability of EVA. CONCLUSIONS: EVA has been successfully used in the training setup showing potential of endoscopic video analysis to assess laparoscopic psychomotor skills. The results encourage further implementation of video tracking in training setups and in image guided surgery.
Surgical Endoscopy
Impact factor JCR
Impact info
Journal number
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Epub ahead
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Epub ahead
  • Autor: Ignacio Oropesa Garcia UPM
  • Autor: Patricia Sanchez Gonzalez UPM
  • Participante: Magdalena K. Chmarra Delft University of Technology
  • Autor: Pablo Lamata Univesity of Oxford
  • Autor: Alvaro Fernandez Perez UPM
  • Autor: Juan Alberto Sánchez Margallo Centro de Cirugía de Mínima Invasión Jesús Usón
  • Autor: Frank Willem Jansen Leiden University Medical Centre
  • Autor: Jenny Dankelman Delft University of Technology
  • Autor: Francisco Miguel Sánchez Margallo Centro de Cirugía de Mínima Invasión Jesús Usón
  • Autor: Enrique Javier Gomez Aguilera UPM

Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Grupo de Bioingeniería y Telemedicina