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.
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Evaluate CT scan data
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Correct for inhomogeneities
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Document relationship between CT number and tissue electron density
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Simulate indicated tissue within the diagnostic energy range
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Quick assessment of distance registration
Specifications
| Overall 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 (2 lb)
Electron Density Body without Head Insert: ≈ 2.1 kg (4.7 lb)
|
| Materials |
Water and Tissue Equivalent Epoxy Resins |
Model 062M Includes
| Qty |
Part No. |
Description |
*Physical Density,
g/cc |
Electron Density,
x 10²³ electrons/cc |
RED
(Relative to H2O) |
| 1 |
062MA-01 |
Electron Density Head Insert |
1.029 |
3.333 |
0.998 |
| 1 |
062MA-02 |
Electron Density Body without Head Insert |
1.029 |
3.333 |
0.998 |
| 2 |
062A-04 |
Lung (Inhale) Equivalent
Electron Density Plug |
0.20 |
0.634 |
0.190 |
| 2 |
062A-05 |
Lung (Exhale) Equivalent
Electron Density Plug |
0.50 |
1.632 |
0.489 |
| 2 |
062A-06 |
Breast (50% Gland / 50% Adipose)
Equivalent Electron Density Plug |
0.99 |
3.261 |
0.976 |
| 2 |
062A-08 |
Solid Trabecular Bone (200 mg/cc HA)
Equivalent Electron Density Plug |
1.16 |
3.730 |
1.117 |
| 2 |
062A-09 |
Liver Equivalent Electron Density Plug |
1.07 |
3.516 |
1.052 |
| 2 |
062A-10 |
Muscle Equivalent Electron Density Plug |
1.06 |
3.483 |
1.043 |
| 2 |
062A-11 |
Adipose Equivalent Electron Density Plug |
0.96 |
3.171 |
0.949 |
| 2 |
062A-15 |
Solid Dense Bone (800 mg/cc HA)
Equivalent Electron Density Plug |
1.53 |
4.862 |
1.456 |
| 1 |
062A-27 |
Solid Dense Bone (1250 mg/cc HA)
Equivalent Electron Density Plug |
1.82 |
5.663 |
1.695 |
| 1 |
062MA-39 |
Water Equivalent Material Surrounding Removable
Ø 1" Vial for Real Water Electron Density Plug |
1.00 |
3.340 |
1.000 |
| 1 |
062M-30 |
Set of 2 Feet for Model 062M |
| 1 |
062M-40 |
Soft Carry Case for Model 062M |
| 1 |
|
User Guide |
| - |
|
48 Month Warranty |
Optional Accessories
| Qty |
Part No. |
Description |
*Physical Density,
g/cc |
Electron Density,
x 10²³ electrons/cc |
RED
(Relative to H2O) |
| 1 |
062MA-07** |
800 mg/cc HA in Water Equivalent - Core Insert |
1.53 |
4.862 |
1.456 |
| 1 |
062MA-12** |
Titanium Rod Core Insert |
4.51 |
12.475 |
3.735 |
| 1 |
062MA-13 |
Distance Marker Insert |
1.029 |
3.333 |
0.998 |
| 2 |
062MA-16 |
Water Equivalent Insert |
1.029 |
3.333 |
0.998 |
| 1 |
062MA-17** |
1000 mg/cc HA in Water Equivalent - Core Insert |
1.66 |
5.243 |
1.570 |
| 1 |
062MA-18** |
1250 mg/cc HA in Water Equivalent - Core Insert |
1.82 |
5.663 |
1.695 |
| 1 |
062MA-19** |
ICRU Cortical Bone Equivalent Core Insert** |
1.93 |
5.956 |
1.780 |
| 1 |
062MA-20** |
1500 mg/cc HA in Water Equivalent - Core Insert |
1.99 |
6.134 |
1.837 |
| 1 |
062MA-21** |
1750 mg/cc HA in Water Equivalent - Core Insert |
2.15 |
6.600 |
1.976 |
| 1 |
062A-26 |
Solid Dense Bone (1000 mg/cc HA) Equivalent
Electron Density Plug |
1.66 |
5.243 |
1.570 |
| 1 |
062A-28 |
Solid Dense Bone (1500 mg/cc HA) Equivalent
Electron Density Plug |
1.99 |
6.134 |
1.837 |
| 1 |
062A-29 |
Solid Dense Bone (1750 mg/cc HA) Equivalent
Electron Density Plug |
2.15 |
6.600 |
1.976 |
* 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.
** These inserts have a a standard 30 mm diameter and contain a 10 mm diameter core of the indicated reference surrounded by H2O-equivalent background. Hydroxyapatite (unit mg/cc) in H2O background Plugs to accommodate chambers, TLD’s and film available upon special request. The titanium reference has a unique diameter of 6.35 mm.
*** CIRS Cortical bone reference is based on ICRU Report No.44, and represents ??12.2% H20, 24.6% protein, 58% mineral (assumed to be Calcium Hydroxyapatite (HA)), and 5.2% monosaccharides. CIRS further offers a series of mineral density references that mimic various HA concentrations in a pure water-equivalent epoxy background matrix.
Radiation Instruments
Dosimeters film
