Rebecca E. Feldman1, Jamu Alford2, Timothy Scholl2, Blaine A. Chronik2
1Medical Biophysics, University of Western Ontario, London, Ontario, Canada; 2Physics and Astronomy, University of Western Ontario, London, Ontario, Canada
Gradients in diffusion-weighted imaging play two distinct roles. A gradient with a linear range sufficient to cover the sample is required for imaging. For the diffusion-weighting, the gradient is only required to be strong. A fourth gradient was inserted into the bore for the purposes of diffusion-weighting only. The inserted gradient was pulsed twice, before and after the 180 degree RF pulse, and the image acquisition was done using the whole body gradients. Using the insert b-values greater than 1000 s/mm2 were obtained a time frame that would permit only a b-value of 100 using the whole-body gradients.