NASCET vs ECST: How to Measure Carotid Stenosis on CTA or MRA
Learn the NASCET and ECST carotid stenosis formulas, reference diameters, near-occlusion pitfall, worked example, and report wording for CTA or MRA.
RadPhrases Editorial Team3 min de lectura
NASCET and ECST use the same narrowest residual internal carotid artery lumen but different reference diameters. NASCET compares that lumen with the normal distal cervical ICA; ECST compares it with the estimated original diameter of the carotid bulb. The percentages therefore are not interchangeable.