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Erschienen in:

17.04.2018 | Urogenital

Non-contrast-enhanced magnetic resonance angiography: a reliable clinical tool for evaluating transplant renal artery stenosis

verfasst von: Long Jiang Zhang, Jin Peng, Jiqiu Wen, U. Joseph Schoepf, Akos Varga-Szemes, L. Parkwood Griffith, Yuan Meng Yu, Shu Min Tao, Yan Jun Li, Xue Feng Ni, Jian Xu, Dong Hong Shi, Guang Ming Lu

Erschienen in: European Radiology | Ausgabe 10/2018

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Abstract

Purpose

To evaluate image quality of non-contrast-enhanced magnetic resonance angiography (MRA) and compare transplant renal artery stenosis (TRAS) seen by non-contrast-enhanced MRA with digital subtraction angiography (DSA) as the gold standard.

Materials and methods

330 patients receiving 369 non-contrast-enhanced MRA examinations from July 2014 to June 2017 were included. Thirty patients received at least two MRA examinations. Image quality was independently assessed by two radiologists. Inter-observer agreement was analyzed. Transplant renal artery anatomy and complications were evaluated and compared with DSA. If possible, accuracy was calculated on a per-artery basis.

Results

Good or excellent image quality was found in 95.4 % (352/369) of examinations with good inter-observer agreement (K=0.760). Twenty-two patients with DSA had 28 non-contrast-enhanced MRA examinations within a 2-month period. Of these, 19 patients had TRAS, two patients had pseudoaneurysms, and one patient had a normal transplant renal artery but an occluded external iliac artery. Non-contrast-enhanced MRA correctly detected 19 TRAS and nine normal arteries, giving 96.6 % accuracy on a per-artery basis.

Conclusions

Non-contrast-enhanced MRA demonstrates a good depiction of the transplanted renal artery and shows good correlation with DSA in cases where there was TRAS.

Key Points

• Good or excellent image quality was found in 95.4 % of examinations.
• Non-contrast-enhanced MRA can clearly map transplant renal artery anatomy.
• Non-contrast-enhanced MRA is a reliable tool to detect TRAS.
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Metadaten
Titel
Non-contrast-enhanced magnetic resonance angiography: a reliable clinical tool for evaluating transplant renal artery stenosis
verfasst von
Long Jiang Zhang
Jin Peng
Jiqiu Wen
U. Joseph Schoepf
Akos Varga-Szemes
L. Parkwood Griffith
Yuan Meng Yu
Shu Min Tao
Yan Jun Li
Xue Feng Ni
Jian Xu
Dong Hong Shi
Guang Ming Lu
Publikationsdatum
17.04.2018
Verlag
Springer Berlin Heidelberg
Erschienen in
European Radiology / Ausgabe 10/2018
Print ISSN: 0938-7994
Elektronische ISSN: 1432-1084
DOI
https://doi.org/10.1007/s00330-018-5413-3

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