Self-Correction of B1 Inhomogeneity Artifact in Diffusion-Weighted Imaging Using Double-Angle Excitation

Kun Zhou¹, Wei Liu¹

In diffusion-weighted imaging (DWI), B1 inhomogenetiy induced signal nonuniformity artifacts may degrade image quality and affect diagnosis. A modified DW-EPI sequence with build-in double-angle B1+ mapping mechanism is introduced to address this problem. With the modified sequence, the B1 inhomogeneity information can be calculated and used to reduce related artifacts in DWI images.