Impact of contrast injection and stent-graft implantation on reproducibility of volume measurements in semiautomated segmentation of abdominal aortic aneurysm on ... View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2014-07

AUTHORS

Florence Morin-Roy, Claude Kauffmann, An Tang, Sofiane Hadjadj, Olivier Thomas, Nicolas Piché, Stéphane Elkouri, Dan Yang Yang, Éric Therasse, Gilles Soulez

ABSTRACT

PURPOSE: To assess the impact of contrast injection and stent-graft implantation on feasibility, accuracy, and reproducibility of abdominal aortic aneurysm (AAA) volume and maximal diameter (D-max) measurements using segmentation software. MATERIALS AND METHODS: CT images of 80 subjects presenting AAA were divided into four equal groups: with or without contrast enhancement, and with or without stent-graft implantation. Semiautomated software was used to segment the aortic wall, once by an expert and twice by three readers. Volume and D-max reproducibility was estimated by intraclass correlation coefficients (ICC), and accuracy was estimated between the expert and the readers by mean relative errors. RESULTS: All segmentations were technically successful. The mean AAA volume was 167.0 ± 82.8 mL and the mean D-max 55.0 ± 10.6 mm. Inter- and intraobserver ICCs for volume and D-max measurements were greater than 0.99. Mean relative errors between readers varied between -1.8 ± 4.6 and 0.0 ± 3.6 mL. Mean relative errors in volume and D-max measurements between readers showed no significant difference between the four groups (P ≥ 0.2). CONCLUSION: The feasibility, accuracy, and reproducibility of AAA volume and D-max measurements using segmentation software were not affected by the absence of contrast injection or the presence of stent-graft. KEY POINTS: • AAA volumetry by semiautomated segmentation is accurate on CT following endovascular repair. • AAA volumetry by semiautomated segmentation is accurate on unenhanced CT. • Standardization of the segmentation technique maximizes the reproducibility of volume measurements. More... »

PAGES

1594-1601

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s00330-014-3175-0

DOI

http://dx.doi.org/10.1007/s00330-014-3175-0

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1026345620

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/24801978


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