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[MR-micturating cystourethrography using radical k-space sampling]

C C Nolte-Ernsting1, A Glowinski, F J Katterbach

  • 1Klinik für Radiologische Diagnostik, Universitätsklinikum der RWTH Aachen.

Rofo : Fortschritte Auf Dem Gebiete Der Rontgenstrahlen Und Der Nuklearmedizin
|May 20, 1998
PubMed
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Real-time magnetic resonance imaging (MRI) enables micturating cystourethrography (MCU) for dynamic visualization of the urethra during urination without radiation exposure. This novel technique assesses the urinary tract and pelvic floor, aiding in diagnosing conditions like incontinence.

Area of Science:

  • Medical Imaging
  • Urology
  • Radiology

Background:

  • Traditional micturating cystourethrography (MCU) involves radiation exposure.
  • There is a need for non-ionizing imaging techniques for evaluating lower urinary tract function.

Purpose of the Study:

  • To assess the feasibility of real-time magnetic resonance imaging (MR) for micturating cystourethrography (MCU).
  • To evaluate MR-MCU using radial k-space sampling for dynamic urethral visualization.

Main Methods:

  • MR-MCU was performed in 7 male patients following gadolinium(Gd)-DTPA-enhanced MR-urography.
  • Real-time MR-fluoroscopy utilized a T1-weighted gradient-echo sequence with radial k-space sampling and 10 mm slice thickness.

Main Results:

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  • Dynamic, real-time imaging of Gd-flow within the urethra during micturition was achieved in all patients.
  • Demonstrated normal urethral anatomy, its relation to the prostate and pelvic floor, and assessed the urinary bladder.
  • Visualized ureters due to residual Gd-enhancement from prior MR-urography.

    • Conclusions:

    • MR-MCU with Gd-DTPA and radial k-space acquisition offers radiation-free, real-time urethral visualization during micturition.
    • This modality allows assessment of the bladder, pelvic floor, and upper urinary tract.
    • Suggests potential for diagnosing vesicoureteral reflux and urinary incontinence.