A phantom for quantitation of partial volume effects in ECT

A special phantom has been designed, built, and tested to measure the quantitative recovery of ECT (emission computed tomography) data from the heart as a function of the size of the object and the angulation of a 1-cm-thick simulated myocardium inclined with respect to the image plane. The phantom consists of five objects of 0.5, 1.0, 1.5, 2.0, and 3.0 cm width and six 1-cm-thick strips inclined at 0, 30, 45, 60, 90, and -90 degrees with respect to the axial direction. Recovery coefficients for different object sizes and a simulated 1-cm-thick myocardium inclined at different angles can be obtained from a single scan. The adequacy of axial sampling can be observed visually by creating the long-axis view of the phantom