High signal intensity halo around the carotid artery on maximum intensity projection images of time-of-flight MR angiography: a new sign for intraplaque hemorrhage.

Purpose: To evaluate the value of the high signal intensity halo sign as a new marker of a fresh or recent intraplaque hemorrhage on the maximum intensity projection (MIP) images of time-of-flight (TOF) MR angiography.

Materials And Methods: A total of 135 consecutive patients were included in this study. High-resolution MRI using 3-inch surface coils was performed on a 1.