Three-dimensional imaging core laboratory of the endovascular aneurysm repair trials: validation of methodology

Wyss, T R; Dick, F; England, A; Brown, L C; Rodway, A D; Greenhalgh, R M (2009). Three-dimensional imaging core laboratory of the endovascular aneurysm repair trials: validation of methodology. European journal of vascular and endovascular surgery EJVES, 38(6), pp. 724-31. London: Elsevier 10.1016/j.ejvs.2009.09.007

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OBJECTIVE: The aim of this study was to establish and validate a three-dimensional imaging protocol for the assessment of Computed Tomography (CT) scans of abdominal aortic aneurysms in UK EVAR trials patients. Quality control and repeatability of anatomical measurements is important for the validity of any core laboratory. METHODS: Three different observers performed anatomical measurements on 50 preoperative CT scans of aortic aneurysms using the Vitrea 2 three-dimensional post-imaging software in a core laboratory setting. We assessed the accuracy of intra and inter observer repeatability of measurements, the time required for collection of measurements, 3 different levels of automation and 3 different automated criteria for measurement of neck length. RESULTS: None of the automated neck length measurements demonstrated sufficient accuracy and it was necessary to perform checking of the important automated landmarks. Good intra and limited inter observer agreement were achieved with three-dimensional assessment. Complete assessment of the aneurysm and iliacs took an average (SD) of 17.2 (4.1) minutes. CONCLUSIONS: Aortic aneurysm anatomy can be assessed reliably and quickly using three-dimensional assessment but for scans of limited quality, manual checking of important landmarks remains necessary. Using a set protocol, agreement between observers is satisfactory but not as good as within observers.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Department of Cardiovascular Disorders (DHGE) > Clinic of Cardiovascular Surgery

UniBE Contributor:

Wyss, Thomas Rudolf and Dick, Florian

ISSN:

1078-5884

Publisher:

Elsevier

Language:

English

Submitter:

Factscience Import

Date Deposited:

04 Oct 2013 15:12

Last Modified:

04 May 2014 23:23

Publisher DOI:

10.1016/j.ejvs.2009.09.007

PubMed ID:

19828337

Web of Science ID:

000273143400010

URI:

https://boris.unibe.ch/id/eprint/31718 (FactScience: 196378)

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