Comparison of T2* Measurements in Human Brain at 1.5, 3 and 7 T
Hoogenraad F, Bowtell R, Morris P, Gowland P, Francis S, Brookes M, Peters A
Philips Medical Systems
The characterisation of T2* in brain tissue is important for optimisation of MRI protocols. It may also be relevant in the identification of diseased tissue, since T2* values are affected by iron content. Here, we employ a modified EPI sequence in order to measure T2* in cortical grey matter, white matter, and deep grey matter nuclei, for three field strengths. We show that, R2* scales approximately linearly with field strength. Further, in agreement with previous studies we find that the average T2* in cortical grey matter is longer than that in grey matter nuclei.