This phantom is composed of a solid 127mm high x 127mm diameter acrylate cylinder which contains a 101mm deep x 51mm diameter cavity plus a source vial and an acrylate carrier.

Both carrier and cylinder have scribe lines for proper alignment during use. The phantom comes with twelve 30ml capacity source vials. To prepare a liquid standard commercially available iodine capsules can be dissolved directly in the source vials. A special acrylate capsule holder is supplied to enable the user to count the capsules directly without having to dissolve them.

The phantom cylinder has one flat external surface so that it may be used horizontally without rolling.