Sixty-four-detector CT angiography of infrarenal aortic neck length and angulation: prospective analysis of interobserver variability

Journal of Vascular and Interventional Radiology : JVIR
Nicolas DiehmF Dick

Abstract

To quantify the interobserver variability of abdominal aortic aneurysm (AAA) neck length and angulation measurements. A total of 25 consecutive patients scheduled for endovascular AAA repair underwent follow-up 64-row computed tomographic (CT) angiography in 0.625-mm collimation. AAA neck length and angulation were determined by four blinded, independent readers. AAA neck length was defined as the longitudinal distance between the first transverse CT slice directly distal to the lowermost renal artery and the first transverse CT slice that showed at least a 15% larger outer aortic wall diameter versus the diameter measured directly below the lowermost renal artery. Infrarenal AAA neck angulation was defined as the true angle between the longitudinal axis of the proximal AAA neck and the longitudinal axis of the AAA lumen as analyzed on three-dimensional CT reconstructions. Mean deviation in aortic neck length determination was 32.3% and that in aortic neck angulation was 32.1%. Interobserver variability of aortic neck length and angulation measurements was considerable: in any reader combination, at least one measurement difference was outside the predefined limits of agreement. Assessment of the longitudinal extension and angu...Continue Reading

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Citations

Feb 4, 2010·Journal of Vascular and Interventional Radiology : JVIR·Giovanni TorselloCarlo Pratesi
May 30, 2015·European Journal of Vascular and Endovascular Surgery : the Official Journal of the European Society for Vascular Surgery·T Martin-GonzalezS Haulon
Nov 26, 2013·European Journal of Vascular and Endovascular Surgery : the Official Journal of the European Society for Vascular Surgery·H BannoJ-P Becquemin
Jul 12, 2011·European Journal of Vascular and Endovascular Surgery : the Official Journal of the European Society for Vascular Surgery·E V RouwetH J M Verhagen
Oct 16, 2009·European Journal of Vascular and Endovascular Surgery : the Official Journal of the European Society for Vascular Surgery·T R WyssR M Greenhalgh
Mar 30, 2010·Journal of Vascular Surgery·Jasper W van KeulenJoost A van Herwaarden
Jun 19, 2010·Journal of Endovascular Therapy : an Official Journal of the International Society of Endovascular Specialists·Brian D ConwayRaphael Coscas
Oct 9, 2008·Journal of Endovascular Therapy : an Official Journal of the International Society of Endovascular Specialists·Nicolas Diehm, Florian Dick
Jun 19, 2010·Journal of Endovascular Therapy : an Official Journal of the International Society of Endovascular Specialists·Nicola TroisiMartin Austermann
Jul 14, 2012·Journal of Endovascular Therapy : an Official Journal of the International Society of Endovascular Specialists·Tamer GhatwaryPeter J Holt

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