PT  - JOURNAL ARTICLE
AU  - Alexander Rauscher
AU  - Jan Sedlacik
AU  - Markus Barth
AU  - Hans-Joachim Mentzel
AU  - Jürgen R. Reichenbach
TI  - Magnetic Susceptibility-Weighted MR Phase Imaging of the Human Brain
DP  - 2005 Apr 01
TA  - American Journal of Neuroradiology
PG  - 736--742
VI  - 26
IP  - 4
4099  - http://www.ajnr.org/content/26/4/736.short
4100  - http://www.ajnr.org/content/26/4/736.full
SO  - Am. J. Neuroradiol.2005 Apr 01; 26
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.