Emily Koons1, Eric G Stinson2, Patrick Liebig3, Peter Speier3, Krystal Kirby1, Kirk M Welker1, and Andrew J Fagan1
1Radiology, Mayo Clinic, Rochester, MN, United States, 2Siemens Medical Solutions USA, Inc., Rochester, MN, United States, 3Siemens Healthcare GmbH, Erlangen, Germany
1Radiology, Mayo Clinic, Rochester, MN, United States, 2Siemens Medical Solutions USA, Inc., Rochester, MN, United States, 3Siemens Healthcare GmbH, Erlangen, Germany
A
compressed sensing technique adapted for acquiring 3D-SWI data at 7T revealed
enhanced CNR and vein detectability with 48% scan time reduction relative to a
clinical protocol, although some residual image artifacts persisted despite
regularization parameter optimization.
Plot of the number of veins counted as a
function of the regularization parameter for both subjects. Data for the clinical protocol (horizontal
blue dotted line) is compared to that obtained for three CS accelerations
factors (4.6, 7.2 and 8.8).
Effect of increasing CS acceleration factor on
the image quality, comparing: (a) clinical protocol, (b) 4.6, (c) 5.5, (d) 6.3,
(e) 7.2 and (f) 8.8. SSI values,
comparing to the clinical protocol in (a), were 0.45, 0.46, 0.46, 0.47, 0.46,
respectively. Some
residual aliasing is evident in the CS-reconstructed images, but nevertheless good
overall anatomical visibility is maintained up to an acceleration factor of
7.2.