Keywords:
Arteries / Aorta, CT, Stents, Quality assurance
Authors:
A. M. den Harder, D. Suchá, J. Breur, J. Martens, R. P. J. Budde, C. Bos, T. Leiner; Utrecht/NL
Results
An example of FBP and IR at normal and low dose is shown in Figure 3.
At normal dose the median area-derived diameter (range) for all stents with FBP and IR was 17.9 mm (17.3–18.8) and 18.1 mm (17.4–19.0),
respectively and with low-dose 17.9 mm (17.1–18.4) and 17.6 mm (17.6–18.5),
respectively.
Intra-rater and inter-rater reliability at normal dose was good,
with ICCs of 0.892 and 0.813.
Intra-rater reliability at low-dose was good (0.949) while inter-rater reliability decreased (0.572) (Figure 4).
Agreement for intra-rater and inter-rater measurements was excellent with a mean difference (95% Confidence-interval) of 0.25 mm (-0.05-0.54) and 0.29 mm (-0.17-0.74),
at normal dose,
respectively,
and 0.14 mm (-0.07-0.34) and 0.18 mm (-0.70-1.05) at low-dose,
respectively.
Bland–Altman analysis showed comparable diameter measurements at normal and low dose within and between raters (Figure 5).