1. Correlation of North American Symptomatic Carotid Endarterectomy Trial (NASCET) angiographic definition of 70% to 99% internal carotid artery stenosis with duplex scanning 
Gregory L. Moneta, MD, James M. Edwards, MD, Richard W. Chitwood, MD, Lloyd M. Taylor, MD, Raymond W. Lee, MD, Cary A. Cummings, RN, RVT, John M. Porter, MD 
Journal of Vascular Surgery 
Volume 17, Issue 1, Pages (January 1993)
DOI: / (93)90019-I
Copyright © 1993 Society for Vascular Surgery and International Society for Cardiovascular Surgery, North American Chapter Terms and Conditions

2. Fig. 1
ICA angiographic stenosis may be calculated using as reference vessel either measured diameter of distal cervical ICA: (% ICA )] × 100% or estimated diameter of bulb of atherosclerosis: (% ICA stenosis = [1-(c/b)] × 100%). Former technique is used in calculating ICA stenosis in NASCET,5 ACAS study,11 and Veteran's Affairs Cooperative Trial of asymptomatic carotid stenosis.10 Later method was used in developing University of Washington duplex scanning criteria for ICA stenosis and for calculating ICA stenosis in European Cooperative Trial of Carotid Endarterectomy.15
Journal of Vascular Surgery  , DOI: ( / (93)90019-I)
Copyright © 1993 Society for Vascular Surgery and International Society for Cardiovascular Surgery, North American Chapter Terms and Conditions