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Abstract #2249

Diffusion weighted imaging of the kidneys in freely breathing infants using multidirectional scanning

Yvonne Simrn 1 , Eira Stokland 1 , Sverker Hansson 2 , P-A Svensson 1 , and Kerstin Lagerstrand 3

1 Department of Pediatric Radiology, Sahlgrenska University Hospital, Gothenburg, Sweden, 2 Department of Pediatrics, Sahlgrenska University Hospital, Gothenburg, Sweden, 3 MR centre, Sahlgrenska University Hospital, Gothenburg, Sweden

Problem Free breathing renal diffusion weighted MR imaging (DWI) is sensitiv to motion artefacts. Methods Thirteen infants were scanned during free breathing without sedation. Signal to noise ratio (SNR) was compared between conventional DWI, tetrahedral DWI and diffusion tensor imaging (DTI). Results The decrease in SNR was significantly lower for DTI (0.360.11) than for cDWI (0.52 0.08; p<0.05) and tDWI (0.540.1; p<0.05) indicating higher image quality. There was no significant difference in SNR for tDWI compared to cDWI (p=0.08). Conclusion The image quality in DTI appears to be superior to conventional and tetrahedral DWI in free breathing renal imaging.

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