Abstract #0549

Eddy Current Compensated IDEAL

Trevor P. Wade¹,², Curtis N. Wiens³, Charles A. McKenzie¹,⁴

¹Medical Biophysics, University of Western Ontario, London, Ontario, Canada; ²Robarts Research Institute, University of Western Ontario, London , Ontario, Canada; ³Physics and Astronomy, University of Western Ontario, London, Ontario, Canada; ⁴Physics and Astronomy, University of Western Ontario, London , Ontario, Canada

In chemical shift imaging, eddy current induced phase errors in the first echo of multi-echo fat-water separation techniques result in clinically significant biases in the estimates of proton density fat fractions (PDFF). Previously, this bias has been removed by modifying the reconstruction at a cost of reduced noise performance. Instead, we propose using additional gradient pulses to induce similar eddy currents for all echoes. The proposed modification to the pulse sequence was tested on the liver of a healthy volunteer and showed reduced bias in PDFF.