Fig 1. Representative sets of b0 (T2-weighted), b1000 (isotropic diffusion weighted) images, and Trace/3 ADC and FA maps of one inferior section (level of pons) from one subject with conventional (R = 1), and mSENSE and GRAPPA R = 2 based DTI. Compared with R1-PPF and R1-no PPF, a reduction in distortions and off-resonance effects (arrowheads) are apparent with images obtained with mSENSE and GRAPPA R = 2 DTI. Although FA maps obtained with R1-PPF were deemed to be the best in 4 of 5 subjects based on their higher SNR and smoother profiles (qualitative analysis by neuroradiologists), closer inspection showed that peripheral white matter structures such as the middle temporal gyrus (magnified, below FA maps) affected by the distortions with conventional DTI were better resolved with the mSENSE and GRAPPA R = 2 based DTI methods.