Fast, variable system delay correction for spiral MRI

摘要: Purpose Time-varying system delays and eddy currents can substantially reduce the image quality of spiral images. A new method is proposed to estimate variable for spiral-based trajectories. Methods This approach requires a minor modification conventional stack-of-spirals sequence analyzes data collected on three overlapping orthogonal cylinders. Results Initial results are presented acquired synthesized phantom in vivo data. Conclusion The includes gradient coupling effects, no measurements or specialized hardware, robust off-resonance estimates independent continuous each channel over data-sampling period. Magn Reson Med 71:773–782, 2014. © 2013 Wiley Periodicals, Inc.