Imaging sequences, CT-Angiography, CT, Cardiac, Prostheses
R. P. J. Budde, M. L. Dijkshoorn, J. Bekkers, L. E. Swart, M. van Straten, K. Nieman, G. P. Krestin; Rotterdam/NL
Methods and Materials
We retrospectively analyzed the CT scans of patients that were scanned according to the acquistion protocol described below.
The CT acquisition protocol consisted of 3 sequential acquisitions:
Non contrast enhanced prospectively ECG-triggered scan of PHV only at 75% of the R-R interval.
2.Wide pulse window sequential CTA with recons at each 5%,
iterative reconstruction ADMIRE level 4 (Figure 1). For the prospectively ECG-gated sequential scan 3 stacks were planned with the middle stack centered on the valve.
The maximum scanlength for 3 stacks in the z-axis was 14 cm.
3.Low dose high pitch CTA of the entire chest in the venous phase,
reconstructed with iterative reconstruction.
Scans were performed on a 3rd generation dual source CT (Force,
Image quality and the ability to assess PHV leaflet motion were scored on a 5-point scale (1=non-interpretable,
5=excellent). Dose was derived from total DLP.