Figure 2From: Increased absorbed liver dose in Selective Internal Radiation Therapy (SIRT) correlates with increased sphere-cluster frequency and absorbed dose inhomogeneity Light microscopy of filled and empty arterioles. Single spheres and clusters with a string pattern were observed in the arterioles. The images show a string of microspheres in an arteriole (A) and an empty arteriole of the same size (B).Back to article page