Estimating absolute aortic pressure using MRI and a one-dimensional model |
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Authors: | Maya Khalifé ,Astrid Decoene,Filipa Caetano,Ludovic de Rochefort,Emmanuel Durand,Dima Rodrí guez |
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Affiliation: | 1. Imagerie par Résonance Magnétique Médicale et Multi-Modalités (IR4M), Université Paris-Sud - CNRS, UMR 8081, Orsay, France;2. Laboratoire de Mathématiques d?Orsay, Université Paris-Sud - CNRS, UMR 8628, Orsay, France |
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Abstract: | Aortic blood pressure is a strong indicator to cardiovascular diseases and morbidity. Clinically, pressure measurements are done by inserting a catheter in the aorta. However, imaging techniques have been used to avoid the invasive procedure of catheterization. In this paper, we combined MRI measurements to a one-dimensional model in order to simulate blood flow in an aortic segment. Absolute pressure was estimated in the aorta by using MRI measured flow as boundary conditions and MRI measured compliance as a pressure law for solving the model. Model computed pressure was compared to catheter measured pressure in an aortic phantom. Furthermore, aortic pressure was estimated in vivo in three healthy volunteers. |
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Keywords: | Cardiovascular imaging MRI Aorta Blood pressure One-dimensional model Compliance Non-invasive |
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