 outputs from a physiologically based toxicokinetic ( pb - tk ) model for fish were visualized by mapping time - series data for specific tissues onto a three - dimensional representation of a rainbow trout . 
 the trout representation was generated in stepwise fashion : 1 ) cross - section images were obtained from an anesthetized fish using a magnetic resonance imaging system , 2 ) images were processed to classify tissue types and eliminate unnecessary detail . 
 3 ) processed images were imported to a visualization software package ( application visualization system ) to create a three - dimensional representation of the fish , encapsulating five volumes corresponding to the liver , kidney , muscle , gastrointestinal tract , and fat , kinetic data for the disposition of pentachloroethane in trout were generated using a pb - tk model . 
 model outputs were mapped onto corresponding tissues volumes , representing chemical concentration as color intensity . 
 the workstation software was then used to animate the images , illustration the accumulation of pentachloroethane in each tissue during a continuous branchial ( gill ) exposure.imagesp952-afigure 1 . 
 afigure 1 . 
 bfigure 2.figure 3.figure 4.figure 5.figure 6.figure 7.figure 8 . 
 afigure 8 . 
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