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Endourethral MRI.

H H Quick1, J M Serfaty, H K Pannu

  • 1Department of Radiology, Johns Hopkins University, Baltimore, Maryland 21287-0845, USA. HHQuick@uni-essen.de

Magnetic Resonance in Medicine
|January 9, 2001
PubMed
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This study introduces a new endourethral MRI technique for detailed imaging of the female urethra. This advanced method significantly improves signal-to-noise ratio and spatial resolution, aiding anatomical understanding.

Area of Science:

  • Medical Imaging
  • Radiology
  • Anatomy

Background:

  • Despite advancements in MRI, controversy persists regarding female urethral and periurethral anatomy.
  • Existing MRI coils have limitations in visualizing this complex region with sufficient detail.

Purpose of the Study:

  • To develop and evaluate an endourethral approach for ultra-high-resolution Magnetic Resonance Imaging (MRI) of the female urethra and periurethral tissues.
  • To introduce novel radiofrequency (RF) receiver coil designs for endourethral insertion.

Main Methods:

  • Developed two endourethral RF receiver coil designs: a single-loop coil and a phased array/quadrature coil.
  • Incorporated features like flexible coil circuits, direct tuning/matching, active decoupling, and coaxial chokes for enhanced performance and safety.

Related Experiment Videos

  • Utilized a metallic paddle in the phased array design to reduce mutual inductance.
  • Evaluated coil performance in female human cadaver studies and in vivo pig experiments.

    • Main Results:

    • The endourethral approach significantly increased the signal-to-noise ratio (SNR) in the region of interest.
    • Achieved high-resolution MR images of the female urethra with spatial resolution as fine as 78 x 78 micrometers.
    • Demonstrated histologic correlation for the generated MR images.

    Conclusions:

    • The novel endourethral MRI technique provides unprecedented local SNR and spatial resolution.
    • This approach offers valuable new information for understanding female urethral anatomy.
    • The developed RF coils are effective for ultra-high-resolution endourethral MRI.