Anders
Garpebring1, Patrik Brynolfsson1, Ronnie Wirestam2,
Nils stlund3, Mikael Karlsson1
1Radiation Sciences, Ume University,
Ume, Sweden; 2Medical Radiation Physics, Lund University, Lund,
Sweden; 3Biomedical Engineering and Informatics, Ume University
Hospital, Ume, Sweden
Phase
sensitive MRI has shown great potential for quantification of the Arterial
Input Function (AIF). However, motion induced phase artefacts are problematic
for in-vivo measurements and must be compensated for. The purpose of this
study was to compare three different background ROI selection procedures for
compensation of phase errors. Results showed that efficient correction of
motion induced phase shifts requires a background ROI placed close to the
vessel from which the AIF is sampled. Some further improvement can also be
achieved by tracking and compensating for any in-plane motion of the vessel.
Keywords