Phantom Laboratory Catphan 503 - Optional Phantom Annuli

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Optional phantom annuli
Warning
Before mounting a Catphan® phantom with an annulus onto the Catphan® case, the
case must be secured to the table by use of the patient restraint straps or additional
weight. If the case is not secured to the table when the phantom is mounted, the case,
phantom and annulus could fall off the edge of the table.
The following optional annuli are designed to be used with the standard 20cm Catphan®
housing.
CTP299 21.5cm diameter, Teon annulus simulates the high absorption of bone.
CTP539 30cm diameter annulus, cast from the image uniformity material.
CTP540 35cm diameter annulus, cast from the image uniformity material.
CTP579 25-35cm OD oval annulus, cast from the image uniformity material.
CTP599 45-55cm ODoval annulus, cast from the image uniformity material.
CTP326 32cm diameter annulus, machined from acrylic.
The annuli are designed to slide over the 20cm Catphan® housing as illustrated below.
Because the housing material and the uniformity annuli lack lubricity, the annuli may
not slide easily. However, by adding some lubricant the resistance can be reduced.