Abstract #3880

Potential Bias on Measurement of Atherosclerotic Stenosis: The Implication from Calibrations at Various Positions Along Arteries

Kai Lin^1,2, Zhao-qi Zhang¹, Biao Lu¹, Zhan-ming Fan¹

¹Radiology, Beijing Institute of Heart Lung and Blood Vessel Diseases& Beijing Anzhen Hospital, Beijing, China; ²Radiology, The Johns Hopkins University School of Medicine, Baltimore, MD, USA

On CE-MRA and CTA of health volunteers, we retrospectively measured diameter of coronary and carotid artery at 0cm, 1cm, 2cm, 3cm, 4 cm and 5cm along the vessel from the origin. The results showed that calibrations (represented as percentage of calibration at the origin) of distal parts decease gradually and greatly from the origin, especially in the carotid artery. We suggest that different parts selected as reference should be seriously taken account into calculation for atherosclerotic stenosis, especially when NASCET criteria is used.