Shading Reduction at 3.0T using an Elliptical Drive
Weyers D, McKinnon G, Becerra R, Mathew S, Edwards M
Dielectric related artifacts are commonly present at 3.0T in patients having an elliptical crosssectional area. This pheneomenon is prevalent in small patients, usually female, with a flat or concave abdomen. The energy propogation through one axis of the body cooresponds to less phase shift, less signal cancellation, and better homogeneity. Using a new transmit chain, an elliptical drive can be used as an alternative to dielectric pads to overcome shading in the trunk and improve B1 homogeneity over a diverse patient population.