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. Author manuscript; available in PMC: 2022 Oct 14.
Published in final edited form as: Magn Reson Med. 2022 Apr 21;88(2):691–710. doi: 10.1002/mrm.29232

Figure 4.

Figure 4.

Spiral axial imaging of an ISMRM/NIST phantom at 0.55T. (top row) isocenter; (bottom row) off-isocenter with z = 75 mm. A 2D Cartesian GRE reference is also shown (TE and SNR are not matched). CG-SENSE (1st column) clearly shows spatial blurring caused by both concomitant fields and static off-resonance. MaxGIRF can be applied without (2nd column) and with (3rd column) a separately acquired static off-resonance map. MaxGIRF without a static off-resonance map dramatically improves the image quality from CG-SENSE and further improvements are achieved with a static off-resonance map (one exemplary region shown in the orange box).