MRI Compatibility of Robot Actuation Techniques – A Comparative Study

  • Gregory S. Fischer
  • Axel Krieger
  • Iulian Iordachita
  • Csaba Csoma
  • Louis L. Whitcomb
  • Gabor Fichtinger
Part of the Lecture Notes in Computer Science book series (LNCS, volume 5242)

Abstract

This paper reports an experimental evaluation of the following three different MRI-compatible actuators: a Shinsei ultrasonic motor, a Nanomotion ultrasonic motor and a pneumatic cylinder actuator. We report the results of a study comparing the effect of these actuators on the signal to noise ratio (SNR) of MRI images under a variety of experimental conditions. Evaluation was performed with the controller inside and outside the scanner room and with both 1.5T and 3T MRI scanners. Pneumatic cylinders function with no loss of SNR with controller both inside and outside of the scanner room. The Nanomotion motor performs with moderate loss of SNR when moving during imaging. The Shinsei is unsuitable for motion during imaging. All may be used when motion is appropriately interleaved with imaging cycles.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2008

Authors and Affiliations

  • Gregory S. Fischer
    • 1
  • Axel Krieger
    • 1
  • Iulian Iordachita
    • 1
  • Csaba Csoma
    • 1
  • Louis L. Whitcomb
    • 1
  • Gabor Fichtinger
    • 1
    • 2
  1. 1.Center for Computer Integrated SurgeryJohns Hopkins UniversityUSA
  2. 2.School of ComputingQueens UniversityKingstonCanada

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