This document describes models of human carotid arteries that can be used for quality control in clinical trials evaluating atherosclerotic lesions with MRI endpoints. The models are made from cadaveric human carotid arteries and have attributes that closely resemble real carotid arteries, including different stages of atherosclerotic lesions. The models are housed in holders that are compatible with MRI and allow indexing of reference sites. Documentation is provided on the models' composition and standardized MRI acquisition parameters to enable reproducible imaging as an internal standard over long periods.