Regression of Physiological Signals Using Phase-Constrained Inverse Imaging in Functional MRI

Rasim Boyacioglu¹, Markus Barth¹

Phase-constrained inverse imaging (pcInI) combines inverse imaging (InI) and phase-constrained reconstruction. Performance of pcInI is assessed with a moving dots functional paradigm. A phase regressor is obtained for each coil channel and used as confound regressors in the analysis (either individually or after averaging). On group average, cluster size and maximum z-scores increase 52% and 10% (average regressor) and 534% and 36% (individual regressors) with respect to the case with no regressors.