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Abstract #4499

Correcting breast MRI with a generic B-1(+) template for T-1 map calculation

Lieke van den Wildenberg1, Erwin Krikken1, Jannie P. Wijnen1, Josien P. W. Pluim2, Dennis W. J. Klomp1, and Michael J. van Rijssel1

1Center for Image Sciences, UMC Utrecht, Utrecht, Netherlands, 2Biomedical Engineering, Eindhoven University of Technology, Eindhoven, Netherlands

In 7T breast MRI, the use of local transmit coils causes an inhomogeneous B1+ field, decaying towards the pectoral muscle. This leads to differences in image contrast throughout the breasts and in dynamic contrast enhanced (DCE) MR images it has a direct influence on the enhancement kinetic curves. Therefore a correction is necessary. We used B1+ simulations to generate a template to correct the images, because the dynamic range of measured B1+ maps is often insufficient. We validated the template on eleven volunteers. T1-maps were calculated using the generic template as a first step of correcting the DCE images.

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