FINSIG 05
FINSIG 05
FINSIG 05
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<strong>FINSIG</strong> 20<strong>05</strong>Kuopio, Finland1020304<strong>05</strong>0603512 410 20 30 40 50 60Phantom consists of 5 tissue types with spatiallyconstant activity in each.Activity/pixel within each tissue type iscomputed using given blood input function(time-activity curve of ROI #2) and the 1-compartment modelFor the Kalman smoother the state equationis a random walk model, that is F t ≡ I.This means that no information about theblood input or transportation is used in thereconstruction.Simulated activitiesNormalized activity concentration10.80.60.40.200 50 100 150t (s)ROI #1ROI #2ROI #3ROI #4ROI #5Projection bin1020304<strong>05</strong>06070809020 40 60 80 100Projection number35030025020015010<strong>05</strong>00Mikko Kervinen, Department of Applied Physics, University of Kuopio Slide 17
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