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Exradin w2 max sd 1400

Machine QA Patient QA

Exradin® W2 Scintillator System

Unlike other detector types, the water equivalent W2 scintillator does not perturb small field dose distributions when it is placed in the beam, so you can measure small fields with greater accuracy.

Exradin® W2 Scintillator System part of complete solution for: Annual QA Stereotactic

Exradin® W2 Scintillator System Download:

Exradin® W2 Scintillator System Overview

  • AAPM/IAEA TRS 483 states the scintillator is the only detector with a kQ of 1.000, making the W2 the ideal SRS detector.
  • All corrections are built in.
  • Water equivalent.
  • Inherently waterproof.
  • Can be used for both water scanning and point dosimetry.
  • User replaceable fiber, includes both 1x1 mm and 1x3 mm.
  • No dose rate, temperature, or energy dependencies.
  • The W2 system features Čerenkov corrected measurement signals that can be converted to a proportional analog output, which can be read by any electrometer. This allows the W2 system to be connected to a water phantom system for scanning.


  • Scintillating fiber
    1.0 mm diameter x 3.0 mm long
  • Scintillator housing
    2.8 mm diameter x 42 mm long
  • Optical fiber
    1.0 mm diameter core x 2.2 mm diameter jacket x 4 m long


  • Scintillating fiber
    Polystyrene with fluorescent dopants
  • Optical fiber
    Acrylic (PMMA) with Polyethylene jacket
  • Scintillator enclosure
    Epoxy potted within an ABS plastic tip and polyimide stem
  • Optical connector
  • Optical fiber minimum bend radius
    6 cm
  • Scintillating fiber physical density
    1.05 g/cm³
  • Radiation degradation
    ~ 2% / kGy




    Small Fields

    Nov 23rd, 2020 / Overcoming the Small Field Challenge

    Measure small fields like never before with our Micro Ion Chambers and Scintillators. Overcome the challenges of small field dosimetry and learn the advantages Exradin detectors offer for these measurements.
    10 28 smallfield

    Oct 28th, 2020 / Measuring Small Fields: Exradin W2 Scintillator

    You’ve never been able to accurately measure fields this small, with point dosimetry measurement down to 1x1mm.

    Apr 2nd, 2020 / Clinical Utilization of Exradin W2 Scintillator

    Overcome dependencies present in conventional detectors by using the W2 detector to measure small fields accurately and without disruption. With a point dosimetry measurement down to 1x1mm, this detector is invisible to the beam, water equivalent, and offers exceptional resolution. Presented by Jesse McKay, MS DABR.

Tech Notes

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