Abstract #3676
Simultaneous MPRAGE and Non-Contrast MRA with Prospective Motion Correction using Volumetric Navigators
John W Grinstead 1 , Himanshu Bhat 2 , M. Dylan Tisdall 3 , Andre van der Kouwe 3 , William Rooney 4 , and Gerhard Laub 2
1
Siemens Healthcare, Portland, USA, United
States,
2
Siemens
Healthcare, USA, United States,
3
A.A.
Martinos Center for Biomedical Imaging, Massachusetts
General Hospital, MA, United States,
4
Advanced
Imaging Research Center, Oregon Health & Science
University, Portland, OR, United States
The MPRAGE pulse sequence is commonly used for T
1
-weighted
imaging. Previous work showed that the relative signal
intensity of blood in MPRAGE is dominated by the IR
pulse, and by controlling the selectivity of this pulse
across multiple measurements one could generate a
subtraction MR angiogram (MRA) in addition to a standard
T
1
MPRAGE.
However, such a subtraction technique is sensitive to
motion between the multiple measurements, limiting its
applicability. Here we address this shortcoming with the
addition of volumetric navigators for prospective motion
correction, enabling simultaneous MPRAGE and
non-contrast MRA even in the presence of subject motion.
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