Multicenter Validation Study of Real Time (B Mode) Ultrasound, Arteriography, and Pathology: II. Repeatability/Variability Assessment

In 1981 the National Heart, Lung, and Blood Institute awarded contracts to five clinical centers to establish the capabilities of high-resolution B mode ultrasound imaging for detecting and quantitating atherosclerotic lesions in the carotid and iliofemoral arteries of human subjects. This chapter details the repeatability/variability (R/V) component of the carotid artery studies and permits intramodality evaluation between and within-reader variation. The within-technique repeatability procedures described here were limited to evaluation of carotid arteries using B mode ultrasound and angiography.