A PMMA cylinder (160 mm diameter) with recesses to house test inserts. Within the body of the cylinder are features for the following tests; Noise/Uniformity – The lower section of the phantom is uniform PMMA (density 1.20 +/- 1.00%) Geometric Distortion – An array of 2.0 mm diameter, 3.0 mm deep Air gaps are uniformally pitched through one slice of the cylinder Test Inserts are included to perform the following measurements: Spatial Resolution – Line Spread Function (LSF) – PMMA/PTFE interface – Point Spread Function (PSF) – 0.25mm diameter stainless steel wire suspended in air – LP/mm – alternating Aluminium/polymer (XY) (1.0 to 5.0 LP/mm) – LP/mm – alternating Aluminium/polymer (Z) (1.0 to 5.0 LP/mm) Contrast Resolution – 1.0, 2.0, 3.0, 4.0, 5.0 mm diameter rods suspended in PMMA Pixel intensity – 10.0 mm diameter rods suspended in PMMA Beam Hardening Artefacts – A line of three 5.0 mm diameter rods of Ti and Pb suspended in PMMA Blank PMMA insert
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