The British journal of radiology
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To evaluate the agreement between the measurements of perfusion CT parameters in normal livers by using two different software packages. ⋯ At best there was only moderate agreement between both software packages, resulting in some uncertainty and suboptimal reproducibility. Advances in knowledge: Software-dependent factors may contribute to variance in perfusion measurements, demanding further technical improvements. AP measurements seem to be the most reproducible parameter to be adopted when evaluating liver perfusion CT.