Main Features:
-Designed to be used with the 21.6 cm inside diameter flanged and the 20.4 cm inside diameter flangeless phantoms
-Consists of a series of calibration points and a double helices of fine bore clear vinyl tubing with one helix located near the central axis while the other helix secured to the outer cylinder.
–The angular extent of the transaxial images of the tubes (filled with a radioactive tracer) accurately determines the true axial resolution at two distances from the central axis of the insert
–Each interval between two adjacent calibration points corresponds to a knows thickness interval
-May be used in three alternative ways:
– by itself(unmounted) for measurements in air
– as an insert and mounted inside a Data Spectrum cylinder
– simultaneously with the Solid Sphere Set™ that is supplied with the SPECT phantom

Main Applications:
-Practical and reliable measurement of true axial resolution (i.e., actual slice thickness) as opposed to pixel slice thickness (i.e., digital
sampling) of a PET or a SPECT system
-Evaluation of 2 D filtering on axial resolution
-Research

Specifications:
Insert diameter: 19.6 cm
Insert height: 8.9 cm
Distance of inner tubing to central axis: 2.5 cm
Distance of outer tubing to central axis: 8.9 cm
Line pitch of helical tubing: 36 mm/revolution
Spacing of adjacent dots: 3.6 mm