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Abstract #4509

Improving Transmit and Receive Uniformity of 7T Brain MRI

Venkata Veerendranadh Chebrolu1, Sina Tafti2, Aaron Anderson3, and Brad Sutton3,4
1Siemens Medical Solutions USA, Inc., Rochester, MN, United States, 2Siemens Medical Solutions USA, Inc., Urbana, IL, United States, 3Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL, United States, 4Bioengineering Department, University of Illinois at Urbana-Champaign, Urbana, IL, United States


Transmit and Receive inhomogeneity accentuate with increase in MR main magnetic field strength. Recently uniform combined reconstruction (UNICORN) was proposed to improve receive uniformity and applied for improving intensity uniformity of two­-, three-, and N-dimensional 7T MRI data. In this work, we aim to improve both receive and transmit uniformity of 7T brain MRI by applying UNICORN in combination with transmit inhomogeneity correction methods. MP2RAGE images acquired with TrueForm, patient-specific and volume-selective B1 shimming methods were processed using the UNICORN algorithm. Significant improvement in uniformity was achieved using UNICORN compared to unnormalized images.

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