Comprehensive Electron Density Phantom

For the calibration of Hounsfield Unit (HU) vs. electron density of CT radiotherapy treatment plans

  • Calibration of radiation oncology treatment plans
  • Optimization of the delivered dose to the patient
  • Provides realistic tissue simulation and values within the higher density range (bones)
  • Further/multiple tissue-equivalent inserts are available upon request


The phantom is an excellent tool for the calibration of Hounsfield Unit (HU) vs. electron density of radiotherapy treatment plans to optimize the dose delivered to the patient (CT/CBCT).

The Comprehensive EDP phantom is ideally suited for the creation of a HU vs the electron density table for treatment planning CT (4DCT). It consists of a water-equivalent body section and a removable/stand-alone head section with in total 16 holes for exchangeable inserts that mimic real human tissue regarding its physical and electron density according to the ICRU Report 44 and 46. Remarkably, the phantom provides realistic tissue also in the higher density range (bone).

The phantom comes with a protocol displaying physical density, electron density, electron density relative to water and effective atomic number (other values are optional).

The phantom is not only suitable for the high energy ranges (MeV electron, photon, and proton therapy systems), but is also a valuable tool for kV-energies in diagnostic imaging (e.g. Multi-Energy CT).

Comprehensive Electron Density Phantom, QRM-90114      

  • QRM-90115       CED - Rod D25/D10, Titanium core
  • QRM-90116       CED - Rod D25/D10, Stainless Steel core           
  • QRM-90117       CED - Rod D25/D10, Aluminim core
  • QRM-90118      CED - Set 6 rods CaHA, 25 - 400 mg HA/cc
  • QRM-90119      CED - Set 6 rods Iodine 1, - 15 mg I/cc

Comprehensive Electron Density Phantom with different tissue-equivalent rods (click to enlarge):

Body: Phantom dimension: 250 mm x 350 mm
  Phantom height: 150 mm
  Holes: 8 pcs., Ø 25 mm
Head insert: Phantom diameter: 160 mm
  Phantom height: 150 mm
  Holes: 8 pcs., Ø 25 mm
Body Material: Water-equivalent (CTwater, app. 0 HU at 80 - 140 kV)*  
Phantom weight: 12.0 kg  
Tissue-equivalent rods: (Ø 25 mm, height 150 mm)  

*Accuracy ± 5 HU of specified values.

CTwater (2 pcs.)
Lung I (inflated)
Lung II
Lung III
Breast (50/50)
Skeleton-Cortical Bone

Related Videos

Related Downloads

QRM Phantoms for X-ray Imaging ( 5 MB )
Comprehensive EDP ( 2 MB )
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