Journal
PEDIATRIC RADIOLOGY
Volume 48, Issue 8, Pages 1081-1085Publisher
SPRINGER
DOI: 10.1007/s00247-018-4146-4
Keywords
Children; Diffusion tensor imaging; Diffusion-weighted imaging; Kidney; Magnetic resonance imaging; Pyelonephritis; Urinary tract infection
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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. 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.
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