Sabine Mollus1, Maximilian Pietsch1, Irina Waechter-Stehle2, Yang-Chul Boering3, Meike Schmidt3, Jason Foerst3, Sebastian Gruenig3, Mirja Neizel3, Burkhard Sievers<sup
1Philips Research, Aachen, Germany; 2Philips Research, Hamburg, Germany; 3Clinic for Cardiology, Pneumology and Angiology, University Hospital Duesseldorf, Germany; 4Department of Diagnostic and Interventional Radiology, University Hospital Duesseldorf, Germany
TAVI is a catheter-based intervention for high-risk patients with severe aortic valve stenosis. It is based on the replacement of the non-functioning valve by a stent-based prosthesis. Comprehensive, (MR) imaging-based planning is essential for TAVI device selection. Methods for automatic aortic valve planimetry can improve manual evaluations. For this purpose, we developed a MR-based model of the relevant anatomy. In this study, we compare model-based with manual measurements, evaluate the inter-operator variability and perform inter-modality comparisons between MR and CT. The results show that model-based automated aortic root measurements in MR correlate well with manual evaluations and with CT-based measurements. Thus, geometrical modelling proves to be an accurate and innovative technique for automatic aortic root planimetry.