High-resolution MR imaging, CTA, and sonography of the left carotid artery of a 77-year-old man. High-resolution MR imaging, CTA, and sonography of the left carotid artery of a 77-year-old man. Ulcerations (yellow arrow) are shown clearly on CE-MRA (A) and pre- and postcontrast black-blood T1-weighted (D and E) images; however, they were missed on TOF-MRA (B). The calcification on CTA (white arrow, C) causes difficulty when observing the ulceration. Doppler sonography (F) shows no ulceration in the internal carotid artery. J. Yuan et al. AJNR Am J Neuroradiol 2017;38:664-671 ©2017 by American Society of Neuroradiology