Abstract #2919

Distortion Correction for Echo Planar MR Imaging Using the Regularized Inverse Solution of the Point Spread Function (PSF) Map

Yu Cai¹, Qingwei Liu², Hongyu An¹, Weili Lin¹, Craig Hamilton³

¹Radiology, University of North Carolina-Chapel Hill, Chapel Hill, NC, USA; ²BME, University of North Carolina-Chapel Hill, Chapel Hill, NC, USA; ³BME, Wake Forest University, Winston Salem, NC, USA

The PSF mapping technique for distortion correction of EPI images is improved by solving for the inverse solution of the PSF map using Tikhonov regularization. the Tikhonov regularization-based method is robust for the correction of distortion caused by magnetic susceptibility. In particular, in light of the continuing increase of the magnetic field strength in both clinical and research arenas, the proposed Tikhonov method should further improve the image quality of high field MRI.