Abstract #0542
Slab-selective pTX Multiband TOF Angiography at 7 Tesla
Sebastian Schmitter 1 , Xiaoping Wu 1 , Steen Moeller 1 , Edward John Auerbach 1 , Gregor Adriany 1 , Pierre-Francois Van de Moortele 1 , and Kamil Ugurbil 1
1
Center for Magnetic Resonance Research,
University of Minnesota, Minneapolis, MN, United States
Time-of-flight (TOF) angiography significantly benefits
from ultra-high field (
7T)
allowing for improved angiographic contrast and higher
spatial resolution. However, high-resolution TOF at 7T
is associated with challenges: higher resolution
requires longer acquisition and despite stronger
contrast, the latter is spatially heterogeneous due to
shorter RF wavelength at 7T. Previously, we have
addressed spatial heterogeneity by utilizing a
16-channel pTX system together with spoke RF pulses. In
this work we aim to address both challenges,
heterogeneity AND acquisition time by applying a pTX
multi-band technique on a 16-channel pTX system to
simultaneously excite multiple TOF slabs while achieving
homogeneous contrast.
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