message: STYLE: Prefer itk::Math::abs for consistency.
diff: @@ -652,7 +652,7 @@ rtk::ThreeDCircularProjectionGeometry::FixAngles(double & outOfPlan
  const Matrix3x3Type & rm = referenceMatrix; // shortcut
  const double EPSILON = 1e-6; // internal tolerance for comparison
  - if (itk::Math::abs(fabs(rm[2][1]) - 1.) > EPSILON)
  + if (itk::Math::abs(itk::Math::abs(rm[2][1]) - 1.) > EPSILON)
  {
  double oa = NAN, ga = NAN, ia = NAN;
  