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Electron Density Phantom

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Product Description

Correlate CT Number and Tissue Electron Density  

Because CT scans are used to correct for tissue inhomogeneities in radiotherapy treatment planning, it is important to obtain a precise relationship between CT number (in Housfield units) and electron densities. The Model 062M Electron density phantom enables precise correlation of CT data to electron density of various tissues. The phantom is manufactured from CIRS Tissue Equivalent Materials.  

The Model 062M consists of nested disks made from Plastic Water®. This enables both head and abdomen configurations. Eight different tissue equivalent inserts can be positioned at 17 different locations within the scan field. Included is a syringe insert that can be filled with any fluid or solid material. Special marker inserts enable quick assessment of the CT scanner’s distance measurement accuracy.

Physicists performing treatment planning need accurate tools to evaluate CT scan data, correct for inhomogeneities and to document the relationship between CT number and tissue density. To improve the accuracy of your treatment planning, consider the CIRS Model 062 Electron Density Phantom.  

The 062M is just one of three configurations available as a part of the Cone Beam CT Electron Density & Image Quality Phantom System.  


  • Evaluate CT scan data  
  • Correct for inhomogeneities
  • Document relationship between CT number and tissue electron density
  • Simulate indicated tissue within the diagnostic energy range
  • Quick assessment of distance registration  

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