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@antjehellwich.bsky.social Sep 20, 2026, 10:44 AM

Imaging Aortic Dissections and Aneurysms with #MRI: The Clinical Value of Advanced Angiography and 4D Flow Sequences by Dr. Alain Lalande, et al. (Université Bourgogne Europe, Dijon, France).

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#CardioSky #MRA #4DFlowMRI #CMR #WhyCMR

The combination of CS-accelerated MRA and 4D flow MRI offers a comprehensive approach to the imaging of complex aortic diseases, both for initial assessment and longitudinal follow-up.
Compared to conventional contrast-enhanced MRA, the native angiographic sequence offers several advantages:
- high signal-to-noise ratio
- excellent lumen-to-wall contrast
- no requirement for gadolinium-based contrast agents
- free-breathing acquisition
- high isotropic spatial resolution

The addition of 4D flow MRI with multi-VENC acquisition further extends the diagnostic value of the examination. Beyond flow visualization, this sequence supports the quantification of biomechanical parameters such as wall shear stress (WSS) — biomarkers for predicting aneurysmal progression and guiding personalized surgical decision-making.

Combined with deep learning-based automatic segmentation, these two sequences open the door to an integrated workflow, from morphological assessment to hemodynamic quantification and WSS mapping, within a single, clinically feasible examination.

From a practical standpoint, the use of CS reduces the mean acquisition time to approximately 5 to 7 minutes per sequence, potentially improving both patient comfort and robustness to motion.

Shout-out and thank you to the co-authors: Olivier Bouchot, You Zhou (Université Bourgogne Europe, Dijon, France), Marylène Delcey, Daniel Giese, Ning Jin (Siemens Healthineers)

📌 Work in progress. The application is still under development and not commercially available. Its future availability cannot be ensured.

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