Water-equivalent material for CT imaging purposes


  • Water-equivalent resin for clinical X-ray modalities
  • Great long-term stability
  • Specified properties certified with state-of-the-art CT scanners
  • Can be molded into arbitrary shapes


CTwater is a proprietary resin, which has the same X-ray attenuation characteristics as liquid water in the range of 70 to 150 kV. It is an extremely stable, homogenous and uniform solid material.

CTwater is the basis of the European Spine Phantom (ESP) or the Dual Energy Phantom. Apart from this, CTwater is an established and widely used material for CT calibration purposes.



CT water accuracy (depends on several parameters as area of application, quantity or shape):
typically 0 HU ±5 HU (±3 HU)
advanced 0 HU ±1 HU from 70 to 150 kV (ρ = 1.03 mg / ccm)

Related Downloads

CTWater ( 2 MB )
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