Michael Nicholas Hoff1, Jordin D. Green2,
Qing-San Xiang1,3
1Department of Physics & Astronomy,
University of British Columbia, Vancouver, British Columbia, Canada; 2Siemens
Healthcare, Calgary, Alberta, Canada; 3Department of Radiology,
University of British Columbia, Vancouver, British Columbia, Canada
A
fast bSSFP technique is devised for removing imaging artifacts near
metals. 3D phase cycled TrueFISP
provides comprehensive artifact reduction using powerful gradients, two
dimensions of phase encoding, short TR, and thorough refocusing of
magnetization. Problematic banding
artifacts are eliminated using a technique which formulates expressions for
each voxels modulated magnetization, and then analytically solves the system
with a simple Cross-Solution (XS) to obtain the demodulated
magnetization. Application to a
phantom consisting of a hip prosthesis within a Lego structure confirms that
3D imaging with XS-SSFP is simple, efficient, and robust in artifact
reduction.
Keywords