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Magnetic resonance voiding cystourethrography for vesicoureteral reflux
Author(s) -
Takazakura Ryutaro,
Johnin Kazuyoshi,
Furukawa Akira,
Nitta Norihisa,
Takahashi Masashi,
Okada Yusaku,
Murata Kiyoshi
Publication year - 2007
Publication title -
journal of magnetic resonance imaging
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.563
H-Index - 160
eISSN - 1522-2586
pISSN - 1053-1807
DOI - 10.1002/jmri.20822
Subject(s) - cystourethrography , vesicoureteral reflux , magnetic resonance imaging , medicine , urology , radiology , reflux , disease
Purpose To assess the feasibility of magnetic resonance voiding cystourethrography (MRVCUG) using MR fluoroscopy for evaluation of vesicoureteral reflux (VUR), and its use as a noninvasive alternative to standard VCUG. Materials and Methods A total of 22 MR studies of 16 patients (five months to 41 years old) with primary VUR diagnosed by standard VCUG were evaluated. Six patients underwent MR studies and standard VCUG pre‐ and postoperatively. MR fluoroscopy was executed with a non‐enhanced heavily T2‐weighted single‐shot fast spin‐echo (FSE) sequence. The MR findings were correlated with those obtained by the gold standard, standard VCUG. Results Of the 44 kidney‐ureter units, 20 were refluxing on MRVCUG and 21 were refluxing on standard VCUG. There were one false‐positive and two false‐negative units. MRVCUG was 90% sensitive with a specificity of 96% for detecting VURs that were calculated based on kidney‐ureter units. Two false‐negative units were found in mild cases (grade I and II). For the units of grade III, IV, and V (high‐grade reflux), MRVCUG detected all of the refluxing renal collecting systems. Conclusion MRVCUG can demonstrate high‐grade reflux without ionizing radiation or catheterization. J. Magn. Reson. Imaging 2007. © 2006 Wiley‐Liss, Inc.