Figure 2From: Yttrium-90-labeled microsphere tracking during liver selective internal radiotherapy by bremsstrahlung pinhole SPECT: feasibility study and evaluation in an abdominal phantom Sphere CRC. The figure shows the CRC as a function of the actual sphere specific activity times the sphere diameter with reconstructions of 20 iterations × 8 subsets. The true CRC is that obtained with the actual activity ratio.Back to article page