Forty-six patients known to have an abdominal aortic aneurysm were imaged on a helical CT scanner, acquiring 10 mm slices every 10 mm. The eccentricity and tortuosity of each aneurysm was calculated using a centerline-based technique from the volumetric data-set. 
PATIENT #       ECCENTRICITY (E)        TORTUOSITY (alpha), DEGREES
___________________________________________________________________

  1               1.107                   13.1
  2               1.128                   19.6
  3               1.179                   56.0
  4               1.13                    25.8
  5               1.147                   16.9
  6               1.068                   26.9
  7               1.061                   52.3
  8               1.146                    7.3
  9               1.047                   33.0
 10               1.174                   15.1
 11               1.298                    9.6
 12               1.106                   20.9
 13               1.093                   30.8
 14               1.084                   31.0
 15               1.257                   44.9
 16               1.135                   55.9
 17               1.084                   14.3
 18               1.073                   21.4
 19               1.083                    6.3
 20               1.084                    2.6
 21               1.073                    6.3
 22               1.146                    4.4
 23               1.089                   19.1
 24               1.113                    9.6
 25               1.191                   21.7
 26               1.083                   10.6
 27               1.071                   12.0
 28               1.247                   13.3
 29               1.325                   16.2
 30               1.258                   16.9
 31               1.404                   21.9
 32               1.067                   11.2
 33               1.487                   24.2
 34               1.136                   13.5
 35               1.079                   16.0
 36               1.602                   26.9
 37               1.100                   15.2
 38               1.147                   42.8
 39               1.230                   24.7
 40               1.108                   15.1
 41               1.040                   19.8
 42               1.092                   21.9
 43               1.260                   12.8
 44               1.291                   25.2
 45               1.052                    7.7
 46               1.099                    9.6


mean              1.158                   20.5
s.d.              0.118                   12.9





Return to Outline | DPI Homepage | Contact Us | Search