Unrivaled near-water equivalent characteristics produce a more natural dose measurement.


Ideal Characterisation and Measurement of Small Fields


1mm spatial resolution makes the W1 a perfect tool for stereotactic radiosurgery (SRS) and stereotactic body
radiation therapy (SBRT) QA. This includes 
with the Lucy 3D QA Phantom for 
use in Gamma Knife®, Cyberknife®, BrainLab®, Varian®, Elekta® and
TomoTherapy® systems.



Consistent, Convenient Setup


Integration with the Exradin Scintillator Calibration

Slab and water equivalent phantoms allows for easy,

repeatable measurements.



Automatically Account for Cherenkov Signal


Pair the W1 with the SuperMAX Electrometer to effectively correct for Cherenkov radiation without the need for extraneous calculations.

Minimal Disturbance, Fewer Corrections


The W1’s water-equivalent components significantly reduce beam perturbation and negate measurement corrections necessary with other detectors.


  • Near water equivalence

  • Linear dose response

  • Dose rate independence 

  • Energy independent in MV range

  • Temperature independent






Niko Papanikolaou, Ph.D; Geoffrey D. Clarke, Ph.D; Lora T. Watts, Ph.D; Thomas G. Maris, Ph.D; Evangelos Pappas, Ph.D

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Small Field Dosimetry using the Exradin W1


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The patented Exradin W1 Scintillator is the ideal small field measurement

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W1 Scintillator Calibration Slab

Exradin Scintillator Calibration Slab with cover for consistent setup

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SuperMAX software provides an intuitive interface for scintillator

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Exradin W1 Scintillator 










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