Laser Alignment Phantom

This phantom can be used to check the alignment of the internal and external lasers to the radiographic center of CT and PET/CT units and to verify lateral gantry angle. It can also be used with accelerator units to check vertical and lateral gantry angles, laser alignment and vertical table movement.

Technical data:‍

• Made of transparent PMMA 150 x 150 x 50 mm
• Large 150 x 150 mm sides include:
  • Centering scribe lines that go across the phantom on one side
  • Two large holes 9.5 mm in diameter, 106 mm apart center to center in the exact center of a quadrant of the phantom
• Small 50 x 150 mm sides include:
  • Scribed lines through the center of all four sides
  • 2 of those sides are also scribed 50 mm from center
  • 3 pinholes one at center and two 50 mm from center
  • Center pinholes are 1.5 mm in diameter and hold a tungsten pin 15 mm long
  • Off center pinholes are 1.0 mm in diameter
• Scribed lines are 1.3 mm wide and white for ease of viewing
• Optional 5.5 mm diameter tungsten ball in the center for sterotactic collimator verification (it is removable for CT applications)
• Optional insert containing 5 aluminium seeds 1 mm in diameter and 5 mm long with a chart  indicating center to center spacing between seeds
• Levelling platform
  • Made of transparent PMMA
  • Dimensions: 150 x 150 x 10 mm
  • Bubble level and three levelling screws