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Related Experiment Videos

A complication in prescan strategy when using surface coils.

A Jesmanowicz1, W Froncisz, J S Hyde

  • 1Department of Radiology, Medical College of Wisconsin, Milwaukee 53226.

Magnetic Resonance in Medicine
|October 1, 1987
PubMed
Summary
This summary is machine-generated.

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Magnetic resonance imaging (MRI) prescan gain calibration can be affected by coil angle variations. This issue, most prominent with surface coils, impacts signal intensity and requires user awareness.

Area of Science:

  • Medical Imaging
  • Magnetic Resonance Imaging (MRI)

Background:

  • MRI prescan gain calibration is crucial for accurate image quality.
  • Spatial variations in coil reception fields can interfere with this calibration.

Purpose of the Study:

  • To investigate an effect confounding MRI prescan gain setting.
  • To understand the influence of coil geometry and orientation on MRI signal.

Main Methods:

  • Analysis of signal variations in MRI data acquisition.
  • Examination of the relationship between coil reception field and excitation field angles.
  • Evaluation of the effect based on field-of-view and coil dimensions.

Main Results:

  • A spatial variation effect, dependent on coil angle, confounds MRI prescan gain.

Related Experiment Videos

  • The largest signal is observed in a data row shifted from the zero phase-encoding gradient row.
  • This effect is most pronounced when the phase-encoding direction is parallel to the coil plane.

    • Conclusions:

    • Manufacturers should implement strategies to mitigate this intrinsic MRI calibration problem.
    • Users of MRI surface coils need to be aware of this potential source of error.