Dielectric pads were used to improve the contrast of volumetric (3D) gluCEST via enhanced homogenization of B1 fields. Effective placement of the pads required additional coverage of the face due to their physical size to achieve the saturated B1 strength necessary to recover the gluCEST signal from the anterior portions of the brain. The origin of gluCEST's need for high B1 is discussed, and examples of 3D gluCEST images acquired with and without the use of the dielectric pads are provided and repeatability of the 3D gluCEST in the presence of pad placement was determined.
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