RT Journal Article
SR Electronic
T1 Magnetic Susceptibility-Weighted MR Phase Imaging of the Human Brain
JF American Journal of Neuroradiology
JO Am. J. Neuroradiol.
FD American Society of Neuroradiology
SP 736
OP 742
VO 26
IS 4
A1 Rauscher, Alexander
A1 Sedlacik, Jan
A1 Barth, Markus
A1 Mentzel, Hans-Joachim
A1 Reichenbach, Jürgen R.
YR 2005
UL http://www.ajnr.org/content/26/4/736.abstract
AB BACKGROUND AND PURPOSE: MR gradient echo imaging is sensitive to the magnetic susceptibility of different tissue types. The purpose of this study was to investigate the diagnostic potential of MR phase imaging of the human brain.METHODS: High-spatial-resolution, T2*-weighted, single-echo images were acquired in five volunteers and one patient with a brain tumor on a 1.5T system by applying a 3D, first-order, velocity-compensated gradient echo sequence by using a quadrature transmit-receive head coil. Phase images were reconstructed from the raw data and unwrapped by using a region-growing phase-unwrapping algorithm. Low-spatial-frequency components originating from static background susceptibility effects were removed by high-pass filtering.RESULTS: Phase images showed excellent image contrast and revealed anatomic structures that were not visible on the corresponding magnitude images.CONCLUSION: Improved processing of susceptibility-weighted MR phase images offers a new means of contrast for neuroimaging applications.