Performance and accuracy of a morphological MR marker localization at reduced spatial resolutions: results from simulated and real marker images

نویسندگان

  • G. Thörmer
  • N. Garnov
  • J. Haase
  • T. Kahn
  • M. Moche
  • H. Busse
چکیده

Introduction/Purpose Interventional guidance and tracking of MR devices rely on the proper visualization and localization of MR-visible structures or markers. Wireless techniques are relatively easy to implement and less prone to potential hazards but typically do not provide the high update rates as active techniques because localization is performed on fully reconstructed images. Different solutions for image-based localization have already been proposed that work with high spatial resolutions [1-3]. In this work, we used inductively coupled RF (ICRF) coils as MR markers and a 2D Gaussian fitting routine for marker localization and systematically explored the influence of the underlying pixel size (PS). The goal was to evaluate the performance (precision, accuracy and speed of localization) of such an approach for reduced spatial resolutions. Both simulated and scanned MR marker images have been processed to differentiate between imaging and localization contributions to the overall accuracy.

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تاریخ انتشار 2009