The abdominal aortic aneurysm sac after endoluminal exclusion: A medium-term morphologic follow-up based on volumetric technology R. Singh-Ranger, BSc,

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Presentation transcript:

The abdominal aortic aneurysm sac after endoluminal exclusion: A medium-term morphologic follow-up based on volumetric technology R. Singh-Ranger, BSc, FRCS, T. McArthur, DCR, M.Della Corte, W. Lees, PhD, FRCR, M. Adiseshiah, MS, FRCP, FRCS Journal of Vascular Surgery Volume 31, Issue 3, Pages 490-500 (March 2000) DOI: 10.1067/mva.2000.102592 Copyright © 2000 Society for Vascular Surgery and International Society for Cardiovascular Surgery, North American Chapter Terms and Conditions

Fig. 1 Glass phantom aneurysms used in validation of the spiral CT scanner. Journal of Vascular Surgery 2000 31, 490-500DOI: (10.1067/mva.2000.102592) Copyright © 2000 Society for Vascular Surgery and International Society for Cardiovascular Surgery, North American Chapter Terms and Conditions

Fig. 2 Calculation of a HU profile across a CT slice. The increasing values represent the IAVC volume, on either side of which lies an intra-aneurysmal thrombus. On the x-axis is marked the distance A-B. The increasing values on the y-axis represent the edges and the lumen of the IAVC, on either side of which lies an intra-aneurysmal thrombus. The density/HU within the lumen increases to a maximum caused by the mixture of blood and iodinated contrast medium. The value used to segment the IAVC volume is chosen one half of the way along the slope of the profile, in this case 150 HU. This value represents the edge of the thrombus–blood/contrast interface. Journal of Vascular Surgery 2000 31, 490-500DOI: (10.1067/mva.2000.102592) Copyright © 2000 Society for Vascular Surgery and International Society for Cardiovascular Surgery, North American Chapter Terms and Conditions

Fig. 3 Graphs show the results for volume and linear measurements from SCTA of glass aneurysms. A , Correlation between true and scanned volumes at zero HU; B , correlation between scanned and true anteroposterior (AP ) diameters; C , correlations between scanned and true transverse diameters. Journal of Vascular Surgery 2000 31, 490-500DOI: (10.1067/mva.2000.102592) Copyright © 2000 Society for Vascular Surgery and International Society for Cardiovascular Surgery, North American Chapter Terms and Conditions

Fig. 4 Bland-Altmann plots show the degree of agreement between SCTA and sizing angiocatheter. The x-axis gives the linear measures of diameter and length in millimeters. The y-axis gives the difference between our reference measurement of SCTA with 3-D reconstruction and the sizing angiocatheter in millimeters. The difference is positive when the angiocather overestimates a parameter and negative when it underestimates. A , AAA proximal neck length; B , AAA proximal neck diameter; C , distal cuff length; D , distal cuff diameter; and E , length of the intra-aneurysmal vascular channel. Journal of Vascular Surgery 2000 31, 490-500DOI: (10.1067/mva.2000.102592) Copyright © 2000 Society for Vascular Surgery and International Society for Cardiovascular Surgery, North American Chapter Terms and Conditions

Fig. 5 Box whisker plots show the changes in AAA and IAVC volume after endoluminal exclusion with PTFE or Talent endografts. The median is the center line in each box. The upper and lower lines are the 75th and 25th percentiles, respectively. The bars refer to the minimum and maximum values of the range. A , The change in total aneurysm after grafting with PTFE; B , the change in IAVC volume after grafting with PTFE; C , the change in total aneurysm volume after grafting with Talent; and D , the change in IAVC volume after grafting with Talent. Journal of Vascular Surgery 2000 31, 490-500DOI: (10.1067/mva.2000.102592) Copyright © 2000 Society for Vascular Surgery and International Society for Cardiovascular Surgery, North American Chapter Terms and Conditions