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Table 2 Changes in deformation factor ni for the sequence of smaller and bigger squares placed one after another inside the container (with and without water) and different distances (0.40 m, 0.35 m, 0.30 m) between the camera’s lens and analyzed squares

From: A novel vision-based system for quantitative analysis of abdominal aortic aneurysm deformation

Object Environment Distance [m] Average deformation factor ni [-] P
Square 0.05 × 0.05 m → square 0.10 × 0.10 m Without water 0.30 4.03018 ± 0.00053 0.6615
With water 4.03016 ± 0.00054
Without water 0.35 4.03016 ± 0.00053 0.4856
With water 4.03019 ± 0.00052
Without water 0.40 4.03021 ± 0.00083 0.5630
With water 4.03016 ± 0.00071
  1. For each case, n = 220 analyses were performed. P values were calculated using Student’s t test