1EPFL,
Laboratory for Functional and Metabolic Imaging, Lausanne, Vaud, Switzerland;
2University of Geneva, Department of Radiology, Geneva,
Switzerland; 3Universities of Geneva and Lausanne, cole
Polytechnique Fdrale de Lausanne, Lausanne, Vaud, Switzerland; 4University
of Lausanne, Department of Radiology, Lausanne, Vaud, Switzerland
At high magnetic field strengths (B0 > 3T), the inhomogeneous distribution of the B1+ field causes undesirable signal and contrast variations of GM/WM across the brain. These artifacts impair the quality of T2-weigthed images at high field and may mislead any medical diagnosis that depends on these images.