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Abstract #4737

MR Voiding Cystourethrography (MRVC) for Vesicoureteric Reflux in Unsedated Infants

Owen John Arthurs1, Ilse Joubert1, Martin John Graves1, Pat Set1, David John Lomas1

1Department of Radiology, University of Cambridge and Addenbrooke's Hospital, Cambridge, Cambridgeshire, United Kingdom

Vesico-ureteric reflux is a congenital disorder of the paediatric renal tract, for which the current gold standard is the Micturating Cystourethrogram (MCUG). This study evaluated the feasibility of MR voiding cystourethrography using dilute intravesical gadolinium in unsedated infants. Real time interactive switching between gradient echo (SPGR) and SSFSE based pulse sequences allowed 6 children with urinary tract abnormalities to undergo both MCUG and MRI. There was 83% concordance between MCUG and MRVC regarding vesicoureteric reflux, and complete agreement regarding the urethra and bladder. Fluoroscopic MR assessment of the complete paediatric renal tract is possible in unsedated infants.