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Chair for Computer Aided Medical Procedures & Augmented Reality
Lehrstuhl für Informatikanwendungen in der Medizin & Augmented Reality

J. Choi, B. Georgescu, Razvan Ioan Ionasec, S. Raman, G. Hong, X. Liu, Helene Houle, M. A. Vannan
Novel Semi-Automatic Quantitative Assessment of The Aortic Valve and Aortic Root from Volumetric 3D Echocardiography: Comparison to Volumetric Cardiac Computed Tomography (CT)
AHA, New Orleans, USA, November 2008 (bib)

Background
Accurate anatomical and functional assessment of AV and aortic root is crucial to understand the pathophysiology of abnormalities and management decision-making in patient with aortic valve diease and aortic aneurysm.The aim of this study was to evaluate the feasibility of novel semi-automatic assessment of AV and aortic root from volumetric 3-D Echo compared to CT. Methods: Volume-rendered 3-D TEE data were obtained using V5M transducer(Sequoia, Siemens). 6 points (commisures and valve tips) at ED and ES were identified on the 3-D TEE data. Volumetric CT images were acquired using 64-Slice CT(Avanto, Siemens). A dynamic 3-D model of the AV and root were obtained by standard mathematical modeling approach (non-uniform rational B-splines).This enabled automatic visualization and quantification of AV and root. We measured phasic change of the AVA(cm2), diameter of sinotubular junction (d-STJ,mm), sinus of Valsalva(d-SV,mm) and basal ring(d-BR,mm). Results: 364 CT volumes from 41 patients and 23, 3-D TEE volumes from 15 patients with normal to mild AR were acquired. 3-D TEE data about AV and root showed strong correlation with CT data(table). Figure showed representative examples of 3-D Echo and CT modeling. Conclusion: This novel automated 3-D Echo approach provides accurate dimensions of the AV and the aortic root and may aid in valve and root repair procedures.
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