Virtual Water® Phantom True Water-Equivalent Material

An ideal alternative to traditional water phantoms for performing routine QA checks of a linear accelerator.

Tested and Calibrated

Each batch of Virtual Water is tested at an independent calibration lab and verified to be within 0.5% of water at photon energies. It's not affected by changes in humidity or temperature and does not exhibit charge storage effects, a problem common in other water-equivalent materials.

Virtual Water 1

Specifications Material

Epoxy resins and powders to control density and radiation properties


0.2 mm (0.008 in)


1.04 g/cm3

Batch Consistency

±0.02% (measured)

Thicknesses Tolerance

±0.15 mm (0.006 in)

Length & Width Tolerance

±0.5 mm (0.02 in)

The Standard in Water-Equivalency

Slabs are made from water-equivalent material, and are developed to be free of contaminants and air. Slabs from this unique material are exceptionally strong and will not stick together when stacked or stored.

Virtual Water 2

Characterization of the phantom material Virtual Water® in high-energy photon and electron beams

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Virtual Water® Phantom

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