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. Author manuscript; available in PMC: 2019 Mar 1.
Published in final edited form as: Magn Reson Med. 2017 Jun 15;79(3):1345–1353. doi: 10.1002/mrm.26782

FIG. 6.

FIG. 6

Portal-venous input functions from two different patients are shown in (a) and (b). For each patient, input functions derived from motion-corrected (MC) and non-motion-corrected (NMC) images reconstructed with the tornado filter are shown as well as NMC images reconstructed by vendor software on the scanner. NMC images were aligned using rigid image registration before extraction of the input functions. Input function from MC images exhibit larger maximum signal enhancements and are smoother compared to their NMC counterparts. The temporal distance between images is about 1 s for the tornado images and about 3 s for the vendor images. However, the effective temporal resolution for the tornado images is about 7.7 s in the portal vein due to the width of the tornado filter.