The time points when measurements were performed are shown in Figure Figure2.2. The sac volumes were measured preoperatively and at least 10 months after EVAR (median, 22 months; range, 10–52 months). The AWE value after EVAR was calculated immediately (4–7 days) after EVAR and 6 months after EVAR (Fig. (Fig.2).2). For all measurements, we used the imaging data of the contrast-enhanced CT. To assess AWE and sac volumes, 2 of the authors (with 9 and 26 years of experience, respectively, interpreting vascular CT images) independently compared the images. The results of the 2 observers were compared to assess the interobserver variability for all cases.

Measurement time points. CT = computed tomography.

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