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Joint motion in an open MR unit using MR tracking.

A D Pearle1, B L Daniel, A G Bergman

  • 1Department of Diagnostic Radiology, Stanford University School of Medicine, California 94305, USA.

Journal of Magnetic Resonance Imaging : JMRI
|July 10, 1999
PubMed
Summary
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A new system uses an external tracking coil and MR tracking software for active scan plane guidance during joint motion imaging. This method reliably maintains the scan plane for clearer magnetic resonance images of moving joints.

Area of Science:

  • Medical imaging
  • Biomedical engineering
  • Orthopedics

Background:

  • Kinematic magnetic resonance (MR) imaging of joint motion presents challenges in maintaining accurate scan planes.
  • Accurate scan plane positioning is crucial for detailed visualization of joint structures during dynamic movements.

Purpose of the Study:

  • To develop and evaluate a system for active scan plane guidance during kinematic MR examinations of joint motion.
  • To assess the robustness of MR tracking for maintaining the scan plane during physiological joint flexion.

Main Methods:

  • Development of a system integrating an external tracking coil with MR tracking software.
  • Testing the system in a phantom study and during upright, weight-bearing knee flexion.
  • Utilizing the external tracking coil to actively guide and maintain the MR scan plane.

Related Experiment Videos

Main Results:

  • The external tracking coil successfully maintained the scan plane through desired anatomical structures during phantom and in-vivo knee flexion.
  • The MR tracking system demonstrated robustness in guiding the scan plane during active, weight-bearing joint motion.

Conclusions:

  • MR tracking offers a reliable and effective method for guiding the scan plane in kinematic MR imaging of joint motion.
  • This system enhances the feasibility of dynamic MR imaging for studying joint biomechanics and pathology.