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[Functional and morphological MR imaging of the upper urinary tract in the pediatric age group]

W K Rohrschneider1, J-P Schenk

  • 1Sektion Pädiatrische Radiologie, St.-Annastiftskrankenhaus Ludwigshafen. wiltrud.rohrschneider@st.-annastiftskrankenhaus.de

Der Radiologe
|September 27, 2005
PubMed

Insights

Magnetic resonance (MR) urography offers a radiation-free method for diagnosing congenital urinary tract obstruction in children. This advanced imaging combines detailed anatomical views with crucial kidney function assessment, improving diagnostic accuracy.

Area of Science:

  • Radiology
  • Pediatric Imaging
  • Medical Imaging Technology

Background:

  • Congenital urinary tract obstruction (CUTO) diagnosis in children often requires imaging that assesses both anatomy and function.
  • Conventional methods like ultrasound, excretory urography, and scintigraphy have limitations in providing comprehensive, simultaneous morphological and functional data.
  • Magnetic resonance (MR) imaging is emerging as a powerful tool for pediatric diagnostic imaging.

Purpose of the Study:

  • To outline the essential criteria for an effective MR urography technique in the pediatric population.
  • To detail a specific MR urography protocol combining morphological and functional assessments for CUTO.
  • To compare the diagnostic capabilities of MR urography with conventional imaging modalities for pediatric urinary tract abnormalities.

Main Methods:

  • Development and application of a pediatric MR urography technique.
  • Utilizing a combination of T1-weighted fast gradient echo (GE) sequence post-contrast and a heavily T2-weighted 3D inversion recovery (IR)-turbo spin echo (TSE) sequence.
  • Careful selection and optimization of sequence parameters for accurate morphological and functional assessment.

Main Results:

  • The proposed MR urography technique successfully integrates high-resolution morphology and reliable split renal function assessment.
  • MR urography provides superior morphological depiction of the urinary tract, including complex malformations, compared to conventional methods.
  • The technique allows for detailed functional assessment of urinary excretion, crucial for diagnosing CUTO.

Conclusions:

  • MR urography, utilizing specific sequence combinations, is a valuable tool for diagnosing pediatric congenital urinary tract obstruction.
  • This method surpasses conventional techniques in both morphological detail and functional evaluation of the urinary tract.
  • Key advantages include the avoidance of ionizing radiation and the provision of simultaneous functional-morphological diagnostic information.

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