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.