MR geometrical distortion

Geometrical accuracy of images is an essential prerequisite for good registrations and for reliability of . Any geometrical distortion in an MR data set increases the uncertainty on point localization in model space and, as shown in Chapter 3, increases the RMS registration error across the volume of the head.

• Distortion of Stereotactic Markers
  • Data acquisition
  • Data analysis
    • Fitting channels to straight lines
    • Intersection of two channels
  • Results
  • Conclusion
• Field Mapping
  • Three-point Dixon technique
    • Three-Point-Dixon using gradient-echo
  • Results
  • Conclusion