Contrast to noise ratio in parenchymal and major veins at 1.5T and 3T.

<p>CNR in parenchymal (top row) and major veins (bottom row) across TE for the individual subjects at 1.5T (left) and 3T (right). Illustrated data taken from two scanning runs. Red and blue circles represent the average values over all subjects for parenchymal and major veins respectively. Measurements showed that there is a slight inter-subject variability with the average over all subjects (red circles) peak at 65.00±6.93 ms for 1.5T and 44.8±6.5 ms for 3T. Similarly CNR of major veins has a small variation across subjects, with averages peaking at 41.0±6.9 ms for 1.5T and 26.8±6.9 ms for 3T.