Grading of carotid artery stenosis with computed tomography angiography: whether to use the narrowest diameter or the cross-sectional area

ConclusionsCTA (diameter)-based measurements significantly underestimated the degree of carotid stenosis. We recommend the CTA (area) method because of its higher predictive power for a correct stenosis classification and a lack of significant difference in the estimated stenosis level, compared to CDUS.Main messages•Cross-sectional area measurement considers asymmetric shape of the residual vessel lumen.•CTA (diameter) method on average significantly underestimates the true level of stenosis.•CTA (area) method correctly classifies vessels needing surgical intervention.

Source: Insights into Imaging - August 1, 2018 Category: Radiology Source Type: research