title: Validation of intravascular ultrasound for measurement of aortic diameters: Comparison with multi-detector computed tomography.
abstract: BACKGROUND
  Intravascular ultrasound (IVUS) provides real-time imaging of aortic pathology during aortic interventions. The objective of the present study was to validate IVUS measurements using computed tomography (CT) angiography in a sufficiently large cohort.
  
  
  METHODS
  From October 2010 to February 2014, 57 consecutive patients with acute aortic syndrome underwent both IVUS and spiral CT for a total of 509 comparable thoracic aorta segments. Minimum, maximum, and mean diameters were determined at each measurement point.
  
  
  RESULTS
  IVUS measurements of the thoracic aorta (aortic root, brachiocephalic trunk, left common carotid artery, left subclavian artery) ranged from 18-48.5 (mean 33.0) mm, versus 18-48.4 (mean 31.7) mm on CT, with a significant mean difference of 5.1% (p < 0.05). The correlation between methods was generally good, but IVUS tended toward larger diameters than CT in the aortic arch, especially the left subclavian artery. In 78% of measurement sites, total mean diameters were larger on IVUS measurements of the thoracic aorta than on CT measurements.
  
  
  CONCLUSIONS
  IVUS is a reliable tool for measuring aortic diameter, especially in the descending part of the aorta. However, its pitfalls must be considered to prevent choosing an incorrectly sized stent graft in the acute setting of thoracic endovascular aortic repair.
authors.affiliation: a 1 Department of Cardiology, West-German Heart and Vascular Center Essen, University Duisburg-Essen , Essen, Germany.
authors.forename: Rolf Alexander
authors.initials: RA
authors.lastname: Jánosi
authors.affiliation: a 1 Department of Cardiology, West-German Heart and Vascular Center Essen, University Duisburg-Essen , Essen, Germany.
authors.forename: Riccardo
authors.initials: R
authors.lastname: Gorla
authors.affiliation: a 1 Department of Cardiology, West-German Heart and Vascular Center Essen, University Duisburg-Essen , Essen, Germany.
authors.forename: Kim
authors.initials: K
authors.lastname: Rogmann
authors.affiliation: a 1 Department of Cardiology, West-German Heart and Vascular Center Essen, University Duisburg-Essen , Essen, Germany.
authors.forename: Philipp
authors.initials: P
authors.lastname: Kahlert
authors.affiliation: b 2 Department of Thoracic and Cardiovascular Surgery, West-German Heart and Vascular Center Essen, University Duisburg-Essen , Essen, Germany.
authors.forename: Konstantinos
authors.initials: K
authors.lastname: Tsagakis
authors.affiliation: b 2 Department of Thoracic and Cardiovascular Surgery, West-German Heart and Vascular Center Essen, University Duisburg-Essen , Essen, Germany.
authors.forename: Daniel-Sebastian
authors.initials: DS
authors.lastname: Dohle
authors.affiliation: b 2 Department of Thoracic and Cardiovascular Surgery, West-German Heart and Vascular Center Essen, University Duisburg-Essen , Essen, Germany.
authors.forename: Daniel
authors.initials: D
authors.lastname: Wendt
authors.affiliation: b 2 Department of Thoracic and Cardiovascular Surgery, West-German Heart and Vascular Center Essen, University Duisburg-Essen , Essen, Germany.
authors.forename: Heinz
authors.initials: H
authors.lastname: Jakob
authors.affiliation: c 3 Department of Diagnostic and Interventional Radiology and Neuroradiology, University Hospital Essen, University Duisburg-Essen , Essen, Germany.
authors.forename: Thomas
authors.initials: T
authors.lastname: Schlosser
authors.affiliation: d 4 "Heart" Department, University Hospital , Salerno, Italy.
authors.forename: Eduardo
authors.initials: E
authors.lastname: Bossone
authors.affiliation: a 1 Department of Cardiology, West-German Heart and Vascular Center Essen, University Duisburg-Essen , Essen, Germany.
authors.forename: Raimund
authors.initials: R
authors.lastname: Erbel
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001013:Aorta, Thoracic / Q000033:anatomy & histology* / Q000000981:diagnostic imaging*; D017536:Carotid Artery, Common / Q000000981:diagnostic imaging; D017023:Coronary Angiography; D057510:Endovascular Procedures; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D015203:Reproducibility of Results; D015607:Stents; D013348:Subclavian Artery / Q000000981:diagnostic imaging; D014057:Tomography, X-Ray Computed; D018084:Ultrasonography, Interventional / Q000379:methods*
keywords: IVUS; Intravascular ultrasound; TEVAR; aortic aneurysm; computed tomography; thoracic endovascular aortic repair