Abstract #3626
GRAPPA-accelerated coronary MRA benefits from an outer volume suppressing 2D-T 2 -Prep
Andrew J Coristine 1,2 , Jrme Yerly 1,2 , and Matthias Stuber 1,2
1
Department of Radiology, University Hospital
(CHUV) and University of Lausanne (UNIL), Lausanne, VD,
Switzerland,
2
CardioVascular
Magnetic Resonance (CVMR) research centre, Centre for
Biomedical Imaging (CIBM), Lausanne, VD, Switzerland
Two dimensional (2D) spatially selective radiofrequency
(RF) pulses may be used to constrain the location from
which an MR signal is obtained. T
2
-Preparation,
or T
2
-Prep, is a magnetization preparation
scheme used to improve blood/myocardium contrast. By
incorporating a "pencil beam" 2D pulse into a T
2
-Prep
module, one may create a "2D-T2-Prep" that combines
T2-weighting with the intrinsic spatial selectivity of a
2D pulse. This may be of particular benefit to parallel
imaging techniques such as GRAPPA, where artefacts can
originate from residual foldover signal. As the 2D-T
2
-Prep
suppresses signal from outside the area of interest,
parallel imaging artefacts may likewise be reduced. In
this abstract, we present numerical simulations, phantom
validation, and in vivo MRA of the right coronary
artery, demonstrating that GRAPPA accelerated images may
be dramatically improved through the use of a 2D-T
2
-Prep.
This abstract and the presentation materials are available to members only;
a login is required.
Join Here
