Generation of 4D Access Corridors from Real-Time Multislice MRI for Guiding Transapical Aortic Valvuloplasties

  • N. V. Navkar
  • E. Yeniaras
  • D. J. Shah
  • N. V. Tsekos
  • Z. Deng
Part of the Lecture Notes in Computer Science book series (LNCS, volume 6891)


Real-time image-guided cardiac procedures (manual or robot-assisted) are emerging due to potential improvement in patient management and reduction in the overall cost. These minimally invasive procedures require both real-time visualization and guidance for maneuvering an interventional tool safely inside the dynamic environment of a heart. In this work, we propose an approach to generate dynamic 4D access corridors from the apex to the aortic annulus for performing real-time MRI guided transapical valvuloplasties. Ultrafast MR images (collected every 49.3 ms) are processed on-the-fly using projections to extract a conservative dynamic trace in form of a three-dimensional access corridor. Our experimental results show that the reconstructed corridors can be refreshed with a delay of less than 0.5ms to reflect the changes inside the left ventricle caused by breathing motion and the heartbeat.


Cardiac Interventions Real-Time Image-Guided Interventions 4D Access Corridors Magnetic Resonance Imaging 


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Copyright information

© Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  • N. V. Navkar
    • 1
    • 2
  • E. Yeniaras
    • 2
  • D. J. Shah
    • 3
  • N. V. Tsekos
    • 2
  • Z. Deng
    • 1
  1. 1.Computer Graphics and Interactive Media LabUniversity of HoustonHoustonUSA
  2. 2.Medical Robotics Lab, Department of Computer ScienceUniversity of HoustonHoustonUSA
  3. 3.Methodist DeBakey Heart & Vascular CenterHoustonUSA

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