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Electron Density Phantom

Electron Density Phantom
Item Number :
682-062

Electron Density Phantom, Correlate CT Number and Tissue Electron Density

Details

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Electron Density Phantom.
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 Electron Density Phantom enables precise correlation of CT data to electron density of various tissues. The phantom is manufactured from CIRS Tissue Equivalent Materials.

•  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

The Electron Density Phantom consists of two (2) nested disks made from Plastic Water®-LR. They can represent both head and abdomen configurations. Nine (9) different tissue equivalent electron density plugs can be positioned at 17 different locations within the scan field. Included is a water vial plug that can be filled with any fluid. Optional distance marker plugs enable quick assessment of the CT scanner's distance measurement accuracy.

 

Specifications

Overall Dimensions
Electron Density Head Insert:  7” Dia x 1.97” D (180 mm x 50 mm) 
Electron Density Body without Head Insert:  12” W x 10.7” H x 1.97” D (330 mm x 270 mm x 50 mm)

Weight
Electron Density Head Insert:  approx 2 lbs (0.950 kg)
Electron Density Body without Head Insert:  approx 4.7 lbs (2.1 kg)

Materials:   Water and Tissue Equivalent Epoxy Materials

Electron Density Phantom Includes
Electron Density Head Insert

*Physical Density (g/cc):  1.029
Electron Density x 1023 electrons/cc:  3.333
RED (Relative to H2O):  0.998
Quantity:  1

Electron Density Body without Head Insert
*Physical Density (g/cc):  1.029
Electron Density x 1023 electrons/cc:  3.333
RED (Relative to H2O):  0.998
Quantity:  1

Lung (Inhale) Equivalent Electron Density Plug
*Physical Density (g/cc):  0.20
Electron Density x 1023 electrons/cc:  0.634
RED (Relative to H2O):  0.190
Quantity:  2

Lung (Exhale) Equivalent Electron Density Plug
*Physical Density (g/cc):  0.50
Electron Density x 1023 electrons/cc:  1.632
RED (Relative to H2O):  0.489
Quantity:  2

Breast (50% Gland / 50% Adipose) Equivalent Electron Density Plug
*Physical Density (g/cc):  0.99
Electron Density x 1023 electrons/cc:  3.261
RED (Relative to H2O):  0.976
Quantity:  2

Solid Trabecular Bone (200 mg/cc HA) Equivalent Electron Density Plug
*Physical Density (g/cc):  1.16
Electron Density x 1023 electrons/cc:  3.730
RED (Relative to H2O):  1.117
Quantity:  2

Liver Equivalent Electron Density Plug
*Physical Density (g/cc):  1.07
Electron Density x 1023 electrons/cc:  3.516
RED (Relative to H2O):  1.052
Quantity:  2

Muscle Equivalent Insert Electron Density Plug
*Physical Density (g/cc):  1.06
Electron Density x 1023 electrons/cc:  3.483
RED (Relative to H2O):  1.043
Quantity:  2

Adipose Equivalent Insert Electron Density Plug
*Physical Density (g/cc):  0.96
Electron Density x 1023 electrons/cc:  3.171
RED (Relative to H2O):  0.949
Quantity:  2

Solid Dense Bone (800 mg/cc HA) Equivalent Electron Density Plug
*Physical Density (g/cc):  1.53
Electron Density x 1023 electrons/cc:  4.862
RED (Relative to H2O):  1.456
Quantity:  2

Solid Dense Bone (1250 mg/cc HA) Equivalent Electron Density Plug
*Physical Density (g/cc):  1.82
Electron Density x 1023 electrons/cc:  5.663
RED (Relative to H2O):  1.695
Quantity:  1

Water-fillable Electronic Density Plug (Real water data provided)
*Physical Density (g/cc):  1.00
Electron Density x 1023 electrons/cc:  3.340
RED (Relative to H2O):  1.000
Quantity:  1

Set of 2 Feet for 682-062

Soft Carry Case

User Guide

48 Month Warranty

* Physical Density - The actual physical density of the insert can vary within ± 1% of the manufacturing target density.

Note:  CIRS strongly recommends that the user inputs the electron density whenever prompted for material data by the TPS.


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