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Quantification of Gaps in Ablation Lesions Around the Pulmonary Veins in Delayed Enhancement MRI

  • Marta Nuñez GarciaEmail author
  • Catalina Tobon-Gomez
  • Kawal Rhode
  • Bart Bijnens
  • Oscar Camara
  • Constantine Butakoff
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 9126)

Abstract

We propose a method for measuring the quality of pulmonary vein isolation in delayed enhancement MRI images for the patients that underwent atrial radiofrequency ablation. To that end we construct a graph from an anatomy independent representation of the atrium, where every node represents a scar lesion and the edges are the distances between the lesions. Subsequently we search for the shortest path in this graph. The total amount of gap between the scar lesions is measured as the fraction of the path’s length that passes through the healthy tissue. We illustrate the proposed technique using pre-segmented atria from a freely available database and show that the proposed approach is able to measure the amount of gaps in the scar isolating the PV’s as well as provide a meaningful definition of the gap in cases where the scar lesions are patchy and not continuous.

Keywords

Radiofrequency ablation Left atrium Gaps Repeated ablation Graphs Shortest path 

Notes

Acknowledgments

This study was partially supported by the EU FP7 for research, technological development and demonstration under grant agreement VP2HF (no 611823) and by the Spanish Ministry of Science and Innovation (TIN2011-28067).

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Copyright information

© Springer International Publishing Switzerland 2015

Authors and Affiliations

  • Marta Nuñez Garcia
    • 1
    Email author
  • Catalina Tobon-Gomez
    • 2
  • Kawal Rhode
    • 2
  • Bart Bijnens
    • 1
    • 3
  • Oscar Camara
    • 1
  • Constantine Butakoff
    • 1
  1. 1.PhySense, DTICUniversitat Pompeu FabraBarcelonaSpain
  2. 2.Division of Imaging Sciences and Biomedical EngineeringKings College LondonLondonUK
  3. 3.ICREABarcelonaSpain

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