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Erschienen in: European Radiology 8/2016

29.10.2015 | Magnetic Resonance

Non-contrast-enhanced MR angiography using time-spin labelling inversion pulse technique for detecting crossing renal vessels in children with symptomatic ureteropelvic junction obstruction: comparison with surgical findings

verfasst von: Nicolas Brucher, Julie Vial, Christiane Baunin, David Labarre, Olivier Meyrignac, Michel Juricic, Ourdia Bouali, Olivier Abbo, Philippe Galinier, Nicolas Sans

Erschienen in: European Radiology | Ausgabe 8/2016

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Abstract

Objectives

Investigate the feasibility and evaluate the accuracy of non-contrast-enhanced MR angiography (NC-MRA) using time-spin labelling inversion pulse (time-SLIP)to identify crossing renal vessels (CRVs) in children requiring surgical treatment of ureteropelvic junction (UPJ) obstructionand compare to laparoscopic findings.

Materials and methods

Nineteen children ranging from 6 to 16 years of age underwent NC-MRA using the time-SLIP technique before surgery. Two independent readers analysed the MRA images. Number of renal arteries and presence or absence of CRVs were identified and compared with surgicalfindings. Image quality was assessed, as well as the presence of CRVs and measurement of renal pelvis diameter. Intra and inter-reader agreement was calculated using Cohen’s kappa coefficient and Bland–Altman plots.

Results

The overall image quality was fair or good in 88% of cases. NC-MRA demonstrated CRVs at the level of the obstruction in 10 children and no CRV in 9 children. All were confirmed intra-operatively except in one of the nine children. Sensitivity, specificity, NPV, PPV for predicting CRVs were 92%, 100%, 100% and 87.5%, respectively, for both readers.

Conclusion

NC-MRA is a good alternative to contrast-enhanced MRA and CT scanning for identifying CRVs in children with symptomatic UPJ.

Key points

Time-SLIP technique offers acceptable imaging quality for identifying crossing renal vessel.
Time-SLIP technique is easy to apply to the renal MRA examination.
Time-SLIP technique is an alternative to contrast-enhanced MRA and CT scanning.
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Metadaten
Titel
Non-contrast-enhanced MR angiography using time-spin labelling inversion pulse technique for detecting crossing renal vessels in children with symptomatic ureteropelvic junction obstruction: comparison with surgical findings
verfasst von
Nicolas Brucher
Julie Vial
Christiane Baunin
David Labarre
Olivier Meyrignac
Michel Juricic
Ourdia Bouali
Olivier Abbo
Philippe Galinier
Nicolas Sans
Publikationsdatum
29.10.2015
Verlag
Springer Berlin Heidelberg
Erschienen in
European Radiology / Ausgabe 8/2016
Print ISSN: 0938-7994
Elektronische ISSN: 1432-1084
DOI
https://doi.org/10.1007/s00330-015-4065-9

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