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RESEARCH PRODUCT

Dynamic 4D Blood Flow Representation in the Aorta and Analysis from Cine-MRI in Patients

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International audience; Abstract: Natural evolution of aortic disease is characterized by a diameter increase that can result in aortic dissection or rupture. Currently the evaluation of risk of rupture or dissection is based on the size of the aorta. However, this parameter is not always relevant and it appears necessary to define new parameters. In this perspective, 3D velocity imaging acquired with ECG gated velocity-encoded cine-MRI allows the aortic blood flow study. As the acquired images are not directly usable, the present study proposes a 4D-representation Of aortic blood flow in order to optimize the visualization of the particularities of non-laminar flow within the aorta. Image were obtained on a 3T imager, and the acquisition plane was orientated perpendicular to the aorta, at the level of the aortic root, thoracic aorta or abdominal aorta according to the pathology. Hence, several blood flow representations (in 2D, 3D or 4D) are provided, and extraction of new parameters (such as maximum velocity, instantaneous blood flow, hemodynamic pressure, backward flow, etc.) are available.