Meeting Banner
Abstract #3641

When Averaging Only Gets You So Far: Repulsion and Peanut Squashing in Diffusion Tensor MRI

Samuel Bryce Jones1, Emre Kopanoglu2, Chantal Tax2, and Derek Jones2
1Radyr Comprehensive School, Cardiff, United Kingdom, 2CUBRIC, School of Psychology, Cardiff, United Kingdom

This work asks a very simple but important question: To what extent can we recover lost SNR by signal averaging in a standard diffusion tensor MRI experiment? Based on the theory that if SNR of a signal is reduced by a factor (1/m), then m2 signal averages will recover that SNR, the diffusion MRI literature often assumes that averaging is the 'magic bullet'. Here, using Monte Carlo simulations, we show that this only true to a certain extent and, despite averaging, low SNR data results in biased DTI estimates.

This abstract and the presentation materials are available to members only; a login is required.

Join Here