title: Comparison of contrast-enhanced ultrasound and compression elastography in the follow-up after endovascular aortic aneurysm repair.
abstract: OBJECTIVE
  To compare compression elastography and contrast enhanced ultrasound in the follow-up after endovascular aortic aneurysm repair.
  
  
  METHODS
  In this retrospective study a cohort of 33 patients with both CEUS and elastography follow-up examinations after EVAR were included. The examinations were done with a Siemens S 2000 with curved array 4 MHz multi-frequency transducer.
  
  
  RESULTS
  Regarding our inclusion and exclusion criteria we obtained 33 patients. CEUS was used as the preferred examination in determining the presence of an endoleak. The true positive rate for the detection of Endoleaks with compression elastography was 42.4% (14/33), the false positive rate was 12.1% (4/33), the true negative rate was 15.2% (5/33) and the false negative rate was 30.3% (10/33). The sensitivity of compression elastography was therefore 58.3% and the specifity was 55.6%. Kappa coefficient was 0.115.
  
  
  CONCLUSIONS
  Compression elastography does not seem to have any additional advantages in the detection and classification of endoleaks in comparison to CEUS.
authors.affiliation: Department of Anesthesiology, Klinikum rechts der Isar, Technische Universität München, Munich, Germany.
authors.forename: V M
authors.initials: VM
authors.lastname: Gürtler
authors.affiliation: Department of Anesthesiology, Klinikum rechts der Isar, Technische Universität München, Munich, Germany Department for Clinical Radiology, Ludwig-Maximilians-University Hospital Munich-Grosshadern, Germany.
authors.forename: D
authors.initials: D
authors.lastname: Rjosk-Dendorfer
authors.affiliation: Department for Clinical Radiology, Ludwig-Maximilians-University Hospital Munich-Grosshadern, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Reiser
authors.affiliation: Department for Clinical Radiology, Ludwig-Maximilians-University Hospital Munich-Grosshadern, Germany.
authors.forename: D A
authors.initials: DA
authors.lastname: Clevert
mesh_terms: D017544:Aortic Aneurysm, Abdominal / Q000000981:diagnostic imaging*; D015331:Cohort Studies; D003287:Contrast Media; D054459:Elasticity Imaging Techniques / Q000379:methods*; D057510:Endovascular Procedures / Q000379:methods*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D011859:Radiography; D012189:Retrospective Studies; D018615:Ultrasonography, Doppler, Color / Q000379:methods*
chemical_list: D003287:Contrast Media
keywords: AAA; CEUS; EVAR; Endoleak; compression elastography