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Magnetic resonance angiography of the left renal vein

Angiographie par résonance magnétique de la veine rénale gauche

  • Radiological Anatomy
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Summary

The authors evaluated magnetic resonance angiography (MRA) as a possible diagnostic method to image the left renal vein. Twenty-five patients with abdominal aortic aneurysm underwent both plain and contrast-enhanced CT, as well as two-dimensional (2D) sequential time of flight (TOF) MRA. MRA images were evaluated on the basis of the results of CT, taken as the “gold standard” for vessel demonstration. MRA was performed with a 1.5 T superconductive magnet (Magnetom), fast imaging with steady-state free precession (FISP) 2D sequence (TR 40 ms, TE 10 ms, FA 18°). Images were acquired in breath-hold on the coronal and sagittal plane and reconstructed according to maximum intensity projection (MIP) and targeted-MIP techniques. MRA images acquired on the sagittal plane correctly showed the retroaortic course on the left renal v. in six cases. On the coronal plane, targeted-MIP reconstructions for the course of the left renal v. correctly detected its outlet at the level of the inferior vena cava in five cases and of the left iliac v. in one case. MRA appears to be a promising noninvasive vascular imaging technique capable of correctly detecting the course and the outlet of the left renal v. We particularly noticed that the left renal v. can be imaged in a few seconds by using only one scout view with 2D sequential TOF technique on the sagittal plane at the level of the abdominal aorta.

Résumé

Les auteurs ont évalué l'angiographie par résonance magnétique (MRA) comme méthode d'imagerie possible de la v. rénale gauche. 25 patients présentant un anévrysme de l'aorte abdominale ont subi un scanner sans préparation et avec produit de contraste, et une angiographie par résonance magnétique en 2 dimensions (2D) en acquisition répétitive fondée sur le temps de passage (time of flight TOF). Les images obtenues par MRA ont été comparées au résultat du scanner, considéré comme la référence pour l'exploration vasculaire. L'angiographie par résonance magnétique a été réalisée avec un aimant de 1.5 T (Magnetom), en imagerie rapide avec état de précession libre (FISP) en séquence 2D (TR 40 ms, TE 10 ms, FA 18°). Les images ont été acquises dans les plans coronal et sagittal, respiration bloquée, et reconstruites selon les techniques de projection d'intensité maximale (MIP) et de MIP ciblée. Les images par MRA acquises dans le plan sagittal montrent correctement le trajet rétroaortique de la v. rénale gauche dans 6 cas. Dans le plan coronal, les reconstructions par MIP ciblée du trajet de la v. rénale gauche ont montré correctement son abouchement au niveau de la v. cave inférieure dans 5 cas, et au niveau de la v. iliaque gauche dans 1 cas. La MRA paraît être une technique d'imagerie vasculaire non invasive prometteuse, capable de montrer correctement le trajet et l'abouchement de la v. rénale gauche. Nous avons notamment remarqué que la v. rénale gauche pouvait être saisie en quelques secondes en utilisant seulement une vue panoramique générale (mode radio) avec une technique séquentielle TOF en deux dimensions dans le plan sagittal au niveau de l'aorte abdominale.

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Carriero, A., Magarelli, N., Tamburri, L. et al. Magnetic resonance angiography of the left renal vein. Surg Radiol Anat 16, 205–209 (1994). https://doi.org/10.1007/BF01627596

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  • DOI: https://doi.org/10.1007/BF01627596

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