title: Volume estimation of the aortic sac after EVAR using 3-D ultrasound - a novel, accurate and promising technique.
abstract: OBJECTIVE
  Volume estimation is more sensitive than diameter measurement for detection of aneurysm growth after endovascular aneurysm repair (EVAR), but this has only been confirmed on three-dimensional, reconstructed computer tomography (3-D CT). The potential of 3-D ultrasound (3-D US) for volume estimation in EVAR surveillance is unknown.
  
  
  METHODS
  Prospective validation study comparing 3-D US with 3-D CT, using 3-D CT as the gold standard.
  
  
  METHODS
  From August 2011 to March 2012, 93 consecutive EVAR patients were enrolled and examined with both 3-D US and CT angiography (CTA). Image data were analysed in a mutual blinded setup using a 3-D interactive segmentation technique.
  
  
  RESULTS
  The technical success rate of 3D-US was 98% (91/93). In 91 EVAR patients (F/M; 10/81) eligible for further analysis, the mean maximum volume (SD) was 126 (58) ml using 3-D US and 128 (58) ml using 3-D CT. The mean difference was 1 ml (0.4%) and the limits of agreement were -14 to 16 ml (-11; 12%).
  
  
  CONCLUSIONS
  Volume estimation of the aortic sac after EVAR using 3-D US is a feasible and accurate method using 3-D CT as the gold standard.
authors: Department of Vascular Surgery, University Hospital of Copenhagen, Denmark. kimbobank@yahoo.dk
authors: K
authors: K
authors: Bredahl
authors: A
authors: A
authors: Long
authors: M
authors: M
authors: Taudorf
authors: L
authors: L
authors: Lönn
authors: L
authors: L
authors: Rouet
authors: R
authors: R
authors: Ardon
authors: H
authors: H
authors: Sillesen
authors: J P
authors: JP
authors: Eiberg
mesh_terms: D000368:Aged; D001014:Aortic Aneurysm / Q000000981:diagnostic imaging* / Q000473:pathology / Q000601:surgery*; D057510:Endovascular Procedures; D005260:Female; D006801:Humans; D021621:Imaging, Three-Dimensional; D008297:Male; D009929:Organ Size; D011446:Prospective Studies; D015203:Reproducibility of Results; D018084:Ultrasonography, Interventional