Blue Phantom PT

Beam commissioning and machine QA for
Pencil Beam scanning.


The Blue Phantom PT is a targeted solution for the most efficient Quality Assurance

  • Faster machine QA: Minimum water volume for fast filling and faster setup of 50%*
  • Most accurate commissioning: Accurate detector positioning down to 50 μm
  • Compatibility for all PT machines: Magnetic resistant positioning sensors offer full compatibility with all PT systems on the market
  • Easy handling and positioning with a compact design and weight of less than 11 kg (without water)
  • Certified position accuracy: ± 50 μm
  • Inductive sensor positioning with high resistance to magnetic fields and a resolution of <1μm
  • Save time through fast positioning speed, chamber movement of 20 mm/s
  • Step-by-Step and continuous scanning mode
  • Thin (replaceable) PMMA window of PMMA for low range measurements
  • Scan range  up to 380 mm water equivalent depth

Integrated into the myQA workflow

PBS depth profile analysis using myQA Accept


The latest Blue Phantom is based on over 40 years of experience during which IBA Dosimetry has been providing high-quality dosimetry equipment and services to more than 4,000 satisfied water phantom users worldwide. It is specifically designed for Proton Therapy (PT) Pencil Beam Scanning (PBS). The Blue Phantom PT facilitates faster and more accurate commissioning of PT treatment systems which is fundamental for safer patient treatments.

With its scanning software myQA Accept, the Blue Phantom PT is the technologically leading water phantom solution for Proton Therapy beam scanning.

Supported chambers (option):

  • Large electro-chamber Stingray & PPC05 for accurate Bragg peak and absolute dose measurements in PBS
  • Stealth Chamber for increased and more stable measurements

Technical specs

  • Exterior water tank dimensions: 57 x 28 x 27 cm3
  • Scanning volume: 380 mm
  • Sensor resolution: 0.001 mm
  • Position resolution: 0.1 mm
  • Positioning repeatability: +/- 0.01 mm (TBC)
  • Positioning speed: Up to 20 mm/s
  • Thin window: 3 - 5 mm
  • Wall thickness / material: 10 mm / PMMA
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