Ultrasound and nuclear medicine appear to be the modalities of choice when dealing with the imaging study of the urinary system in infants. In children, a CT scan does not have the impact it has had on adults, since pediatric patients present with different pathologies and also because of the peculiar physiological conditions of childhood. The Uro-resonance has emerged as a powerful and useful diagnostic tool, bringing together in a single study anatomical images and functional information as well without the use of ionizing radiation. We review the technical aspects, anatomical and physiological concepts of the study, while providing examples of current applications in the infant.

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