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A Real-Time Predictive Simulation of Abdominal Organ Positions Induced by Free Breathing

  • Alexandre Hostettler
  • Stéphane A. Nicolau
  • Luc Soler
  • Yves Rémond
  • Jacques Marescaux
Part of the Lecture Notes in Computer Science book series (LNCS, volume 5104)

Abstract

Prediction of abdominal organ positions during free breathing is a major challenge from which several medical applications could benefit. For instance, in radiotherapy it would reduce the healthy tissue irradiation. In this paper, we present a method to predict in real-time the abdominal organs position during free breathing. This method needs an abdo-thoracic preoperative CT image, a second one limited to the diaphragm zone, and a tracking of the patient skin motion. It also needs the segmentation of the skin, the viscera volume and the diaphragm in both preoperative images. First, a physical analysis of the breathing motion shows it is possible to predict abdominal organs position from the skin position and a modeling of the diaphragm motion. Then, we present our original method to compute a deformation field that considers the abdominal and thoracic breathing influence. Finally, we show on two human data that our simulation model can predict several organs position at 50 Hz with accuracy within 2-3 mm.

Keywords

Predictive simulation patient dependant modeling free breathing real-time sliding motion skin tracking radiotherapy deformable model incompressibility 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2008

Authors and Affiliations

  • Alexandre Hostettler
    • 1
    • 2
  • Stéphane A. Nicolau
    • 1
  • Luc Soler
    • 1
  • Yves Rémond
    • 2
  • Jacques Marescaux
    • 1
  1. 1.IRCAD-Hôpital Civil, Virtual-surgStrasbourg CedexFrance
  2. 2.Institut de Mécanique des Fluides et des SolidesStrasbourgFrance

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