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Electron Density Phantoms

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  Correlate CT Numner and Tissue Electron Density Because CT scans are used to correct for tissue inhomogeneities in radiation therapy treatment planning, it’s important to obtain a precise relationship between CT number (in Hounsfield units) and electron densities. The Electron Density Phantom en ...Read more

Electron Density Phantoms


  • Description
  • Specifications

 

Correlate CT Numner and Tissue Electron Density

Because CT scans are used to correct for tissue inhomogeneities in radiation therapy treatment planning, it’s important to obtain a precise relationship between CT number (in Hounsfield units) and electron densities. The Electron Density Phantom enables precise correlation of CT data to electron density of various tissues and is manufactured from CIRS tissue equivalent materials.

 

Tissue Equivalent Technology

The phantom consists of two nested disks made from Plastic Water®-LR. The disks can represent both head and abdomen configurations. Nine different tissue equivalent electron density plugs can be positioned at 17 locations within the scan field. Included is a vial plug that can be filled with any fluid. Optional distance marker plugs enable quick assessment of the CT scanner’s distance measurement accuracy. 

 

Improved 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 Electron Density Phantom. 

 

Features:

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

 

 

Dimensions Electron Density Head Insert: Ø 180 mm x 50 mm (Ø x D)
Electron Density Body without Head Insert: 330 mm x 270 mm x 50 mm (W x H x D)
     
Weight Electron Density Head Insert: ≈ 0.950 kg
Electron Density Body without Head Insert:  ≈ 2.1 kg 
     
Materials Water and Tissue Equivalent Epoxy Resins      
           
Items Included with CIRS Model 062M
     
Qty Part No. Description Physical 
Density, g/cc
Electron Density,
x 1023 electrons/
cc
RED (Relative 
to H2O)
1x 062MA-01 Electron Density Head Insert 1.029 3.333 0.998
1x 062MA-02 Electron Density Body without Head Insert 1.029 3.333 0.998
2x 062A-04 Lung (Inhale) Equivalent Electron Density Plug 0.205 0.668 0.200
2x 062A-05 Lung (Exhale) Equivalent Electron Density Plug 0.507 1.658 0.496
2x 062A-06 Breast (50% Gland / 50% Adipose) Equivalent Electron Density Plug 0.99 3.261 0.976
2x 062A-08 Solid Trabecular Bone (200 mg/cc HA) Equivalent Electron Density  Plug 1.16 3.730 1.117
2x 062A-09 Liver Equivalent Electron Density Plug 1.07 3.516 1.052
2x 062A-10 Muscle Equivalent Electron Density Plug 1.06 3.483 1.043
2x 062A-11 Adipose Equivalent Electron Density Plug 0.96 3.171 0.949
2x 062A-15 Solid Dense Bone (800 mg/cc HA) Equivalent Electron Density Plug 1.53 4.862 1.456
1x 062A-27 Solid Dense Bone (1250 mg/cc HA) Equivalent Electron Density Plug 1.82 5.663 1.695
1x 062MA-39 Water-fillable Electron Density Plug, Ø 1” removable vial inside (Real water data provided) 1.00 3.340 1.000
1x 062M-30 Set of 2 Feet for Model 062M      
1x 062M-40 Soft Carry Case for Model 062M      
1x -- User Guide      
           
Optional Accessories        
Qty Part No. Description Physical 
Density, g/cc
Electron Density,
x 1023 electrons/
cc
RED (Relative 
to H2O)
-- 062MA-07 800 mg/cc HA in Water Equivalent - Core Insert 1.53 4.862 1.456
-- 062MA-12 Titanium Rod Core Insert 4.51 12.475 3.735
-- 062MA-13 Distance Marker Insert 1.029 3.333 0.998
-- 062MA-16 Water Equivalent Insert 1.029 3.333 0.998
-- 062MA-17 1000 mg/cc HA in Water Equivalent - Core Insert 1.66 5.243 1.570
-- 062MA-18 1250 mg/cc HA in Water Equivalent - Core Insert 1.82 5.663 1.695
-- 062MA-19  ICRU Cortical Bone Equivalent Core Insert 1.91 5.915 1.771
-- 062MA-20 1500 mg/cc HA in Water Equivalent - Core Insert 1.99 6.134 1.837
-- 062MA-21 1750 mg/cc HA in Water Equivalent - Core Insert  2.15 6.600 1.976
-- 062A-26 Solid Dense Bone (1000 mg/cc HA) Equivalent Plug 1.66 5.243 1.570
-- 062A-28 Solid Dense Bone (1500 mg/cc HA) Equivalent Plug 1.99 6.134 1.837
-- 062A-29 Solid Dense Bone (1750 mg/cc HA) Equivalent Plug  2.15 6.600 1.976
-- 062MA-41 Water Equivalent Material Surrounding Ø 6.4 mm Stainless Steel (Alloy 20) Rod Core Plug 8.03 23.101 6.917
-- 062MA-42 Water Equivalent Material Surrounding Ø 6.4 mm Aluminum Rod Core Plug 2.70 8.008 2.398