Fig. 13

Suboptimal imaging of the aortic annulus in a patient with irregular high heart rate. An 85-year-old female with rapid atrial fibrillation. Due to the irregular heart rate, substantial image registration artefacts severely degraded image quality of CT raw data as well as subsequent post-processing images. Thus, all the required measurements—(a) aortic annulus and (b) width of the SOV, cannot be reliably assessed