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Table 3 Overview of the individual object analysis results divided in two groups representing lesions with a size on mammography of 0.2 mm or 2 mammography image pixels

From: High-resolution 3D micro-CT imaging of breast microcalcifications: a preliminary analysis

   Benign Malignant Test Sign.
      P = 0.05
  Total Obj.N 182 414   
Objects ≤ 0.0042 mm 3 (and larger than 2 micro-CT image voxels) Obj.V (mm 3 ) 0.0011 ± 0.0010 0.0011 ± 0.0010 T-test ns
Obj.S (mm 2 ) 0.0504 ± 0.0374 0.0515 ± 0.0360 T-test ns
Obj.S/Obj.V (1/mm) 80.00 ± 36.29 73.71 ± 29.43 Independent samples Mann-Whitney U test ns
St.Th (mm) 0.0879 ± 0.0277 0.0882 ± 0.0315 T-test ns
SMI 3.13 ± 0.23 3.16 ± 0.2 T-test ns
Obj.N 93 (51%) 262 (63%)   
Objects > 0.0042 mm 3 Obj.V (mm 3 ) 0.0474 ± 0.0530 0.0152 ± 0.0230 Independent samples Mann-Whitney U test s
Obj.S (mm 2 ) 0.8218 ± 0.7996 0.3618 ± 0.3659 Independent samples Mann-Whitney U test s
Obj.S/Obj.V (1/mm) 22.86 ± 7.14 29.71 ± 5.71 T-test s
St.Th (mm) 0.2300 ± 0.0658 0.1684 ± 0.0375 T-test s
SMI 3.02 ± 0.27 3.08 ± 0.21 Independent samples Mann-Whitney U test ns
  Obj.N 65 (36%) 96 (23%)   
  1. Object Volume (Obj.V) in mm3, Object Surface (Obj.S) in mm2, Object Surface/Object Volume (Obj.S/Obj.V) in 1/mm, Structure Thickness (St.Th) in mm, Structure Model Index (SMI), and Object Number (Obj.N). The %-value = percentage of particles of the full amount of benign or malignant particles.
  2. In volume this is represented by a sphere with diameter 0.2 mm: volume = 0.0042 mm3.