DTI experts,<br><br>I have been considering the options of multiple repetitions versus multiple b-values. In light of Correia et al.'s simulations (<a href="http://www.ncbi.nlm.nih.gov/pubmed/18687552" target="_blank">http://www.ncbi.nlm.nih.gov/pubmed/18687552</a>), it seems to me that 30 directions at 2 different b-values may be advantageous (versus 2 repetitions of one b-value at 30 directions) since I am interested in both scalar measures and tractography. Any thoughts on this? Has anyone compared these scenarios in acquired data?<br>
<br>Thanks,<br>Meredith Reid<br>