Fig. 1
From: 3D printed non-uniform anthropomorphic phantoms for quantitative SPECT
Schematic design steps for the construction of the grid-based phantoms. Upper row: kidney phantom with grid-based medulla structure, inserted into a separate cortex-shaped container with a filling hole on top and mounting neck on bottom. Bottom row: grid-based thyroid phantom with hot spots as voids (not shown), printed in an outer container with a plate to connect the two lobes, a filling hole on each lobe and a mounting neck at the bottom