Bartlett et al., testing diameter and area measurements, concluded that carotid stenosis quantification based upon the narrowest diameter reliably predicts the more precise area measurements [7].
Calculation according to diameter takes the narrowest diameter for evaluation and is based on the hypothesis that there is no stenosis in any other direction.
Traditionally, the narrowest diameter of the lumen was used for calculation of carotid artery stenosis, because on DSA images only a diameter can be measured.
A 2.5-mm ESIN was chosen as it occupies about 80% of the narrowest diameter of the ulna to provide a stable fixation.
It was found that Ni nanoparticles embedded in CaO provide the narrowest diameter distribution of CNTs, while the bimetallic Ni Co catalyst allows the formation of the thinnest CNTs with the outer diameter of ∼2 nm.
When CTA is used to quantify the degree of carotid stenosis, we suggest the use of an automatic calculation of stenosis based on cross-sectional area rather than on the narrowest diameter, because area considers asymmetric shapes of stenosis, while diameter depends on the projection.
