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Solid localization marker for MR imaging

B R Condon1, D M Hadley

  • 1Department of Clinical Physics, Institute of Neurological Sciences, Southern General Hospital, Glasgow, Scotland.

Radiology
|August 1, 1997
PubMed
Summary
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A novel solid localization marker, while causing artifacts in magnetic resonance imaging (MRI), proved useful for identifying structures across various imaging parameters. Conventional markers also caused artifacts, limiting their use in precise applications like stereotaxy.

Area of Science:

  • Medical Imaging
  • Biomaterials

Background:

  • Accurate localization is crucial in medical imaging, particularly for procedures like stereotaxy.
  • Conventional oil-based markers used in MRI can introduce artifacts, compromising spatial accuracy.

Purpose of the Study:

  • To evaluate a new solid localization marker against conventional markers for MRI.
  • To determine the relaxation characteristics and chemical shift of the solid marker.
  • To assess the suitability of the solid marker for high-accuracy spatial applications.

Main Methods:

  • Comparison of a solid, stable material with conventional oil-based markers.
  • Assessment of relaxation characteristics (T1, T2) and chemical shift.
  • Evaluation of artifact generation and structural identification capabilities under varying MRI conditions (coils, sequences, fields of view).

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Main Results:

  • Both the solid marker and oil-based markers produced significant chemical shift artifacts.
  • The solid marker exhibited the lowest T2 relaxation time among tested substances.
  • Despite artifacts, the solid marker effectively identified structures across diverse MRI setups.

Conclusions:

  • Solid and oil-based localization markers are unsuitable for applications requiring high spatial accuracy due to artifact induction.
  • The solid marker's utility lies in structure identification across varied magnetic resonance imaging parameters, despite its T2 properties.