PMMA water tank

• Inside cylinder diameter: 214 mm

• Outside cylinder diameter: 220 mm

• Lid has quick disconnect valves for ease of filling and draining

• Aluminum alignment pin (Ø6.3 mm x 76 mm) or a polystyrene TLD insert (for dose measurements) can be attached to the lid

Low contrast section

• Placed at one end of the water tank

• 12 fillable cavities 40 mm deep

• Two pieces of each cavity with diameters: 25.4, 19.0, 12.7, 9.5, 6.4 and 3.2 mm

• Spaced twice their diameter apart from the centerline

• Cavities can be easily filled from the outside with dextrose or sodium chloride solutions of various concentrations

Bone insert

• PTFE annulus

• Wall thickness 6.4 mm, 70 mm long

• Fits over all inserts to harden the beam

CT number linearity insert

• ‍Five 25 mm rods

• Material: polyethylene, PMMA (acrylic), polycarbonate, polystyrene and nylon

• Density values (g/cm³): 0.95, 1.19, 1.20, 1.05 and 1.1 respectively

Resolution insert

• Eight sets / rows of air thru holes (five holes per set)

• Diameters of holes: 1.75, 1.5, 1.25, 1.00, 0.75, 0.61, 0.50 and 0.40 mm

• Distance between each hole is equal to the hole diameter

• Distance between rows 5 mm

• 0.2 mm stainless steel wire positioned longitudinally for calculation of line-spread function

Slice thickness insert

• Three aluminum strips, 0.5 mm thick and 25 mm wide angled at 45°, positioned at the centre and aligned vertically

Geometry insert (optional)

• ‍Contains two pairs of aluminium wire ramps whose slope angle tangent is equal to 0.5

• Middles of ramps intersect on the same plane allowing for very precise evaluation of the slice location

• Contains two sets of four PMMA rods (Ø 10mm) placed in vertexes of two squares (sides 100 mm long)

Triple low contrast insert (optional)

• ‍contains three groups of low-contrast objects. In each group, there are rods of the same density, 20 mm in height and with a diameter ranging from 2 to 15 mm. Density difference between groups and surrounding material is exactly 0.3%, 0.6% and 1.0%

• made of PMMA

Accessories

• Filling tubes

• Optional heavy duty carrying case (04-502)