Diffusion tensor imaging in acute pyelonephritis in children
Diffusion-weighted imaging plays a key role in the imaging of acute pyelonephritis by MRI. However the use of respiratory triggering is challenging and time-consuming in children. Diffusion tensor imaging without respiratory triggering might provide satisfying images of the moving kidneys.
To compare mean diffusivity diffusion tensor images obtained with free breathing with diffusion-weighted images obtained with respiratory triggering.
Materials and methods
Thirty-one children with suspected acute pyelonephritis underwent axial diffusion tensor imaging acquisition with free breathing and axial and coronal diffusion-weighted imaging acquisitions with respiratory triggering. We compared image quality and detection of nephritis between the two sequences.
Diffusion tensor imaging demonstrated agreement with diffusion-weighted imaging in all cases, with no difference in the detection of nephritis areas. The image quality was significantly better with diffusion tensor imaging (P<0.01).
Diffusion tensor imaging could replace diffusion-weighted imaging for diagnosis of acute pyelonephritis.
KeywordsChildren Diffusion tensor imaging Diffusion-weighted imaging Kidney Magnetic resonance imaging Pyelonephritis Urinary tract infection
We are grateful to Nikki Sabourin-Gibbs, Rouen University Hospital, for her help with editing the manuscript.
Compliance with ethical standards
Conflicts of interest
- 1.Subcommittee on Urinary Tract Infection, Steering Committee on Quality Improvement and Management, Roberts KB (2011) Urinary tract infection: clinical practice guideline for the diagnosis and management of the initial UTI in febrile infants and children 2 to 24 months. Pediatrics 128:595–610CrossRefGoogle Scholar
- 3.Riccabona M, Avni FE, Blickman JG et al (2008) Imaging recommendations in paediatric uroradiology: minutes of the ESPR workgroup session on urinary tract infection, fetal hydronephrosis, urinary tract ultrasonography and voiding cystourethrography, Barcelona, Spain, June 2007. Pediatr Radiol 38:138–145CrossRefPubMedGoogle Scholar