Transcatheter Aortic Valve Replacement: Performance of an Aortic Valvular Complex Model for Semi-Automated Quantification of Aortic Annulus Dimensions at Cardiac CT

Ziele: To evaluate the accuracy and time-effectiveness of semi-automated model-based annulus computation compared to manual planimetry for assessment of aortic annulus dimensions prior to transcatheter aortic valve replacement (TAVR). Methode: Retrospectively ECG-gated dual-source cardiac CT data of 50 consecutive TAVR candidates with severe aortic stenosis (82.5 ± 5.8 years) were included. Data were reconstructed at 300 ms past the R-peak and were analyzed using an automatic 3D aortic valve model, fitted to CT data by discriminative learning methods and incremental search. It contains the aortic root's surface,…