ELECTRON DENSITY CUBE WITH REMOVABLE VIAL 
The brain-equivalent cubic insert includes a 
MODEL 038-09
Features:
• Perform CT number to electron den-  
sity calibrations
• Comes standard with 1” diameter vial  
for real water measurements
• Compatible with all Model 062M   
Electron Density reference plugs
water-equivalent electron density plug sur
rounding a removable 1” diameter vial for 
water or other liquids. The insert can accom
modate any of the standard electron density 
plugs offered with CIRS Electron Density 
Phantom (Model 062M). Additional plugs, 
including high-density options, can be pur
chased separately. The Electron Density Cube 
is useful for refining CT number to electron 
density calibrations.
WINSTON LUTZ CUBE WITH Ø5MM CENTROID AND OFF-CENTER TARGETS 
MODEL 038-10 
Features:
• Ø5 mm tungsten BB fiducial at the   
centroid
• Ø5 mm target offset from center
Interchangeable Inserts
MRI/PET/CT SPHERICAL TARGET INSERT 
MODEL 038-11
The insert facilitates multi-modality image 
reconstruction tests. Its 30 mm diameter 
spherical tumor volume allows for assessment 
of image and reconstruction integrity when 
images are moved among different imag
ing systems. This insert is designed to work 
together with the “matching target” in the Ion 
Chamber Target Dosimetry Kit (038-06-CVXX
xx) and Single Film Target Dosimetry Insert 
(Model 038-05). The series of interchangeable 
inserts enables enhanced end-to-end testing 
of image acquisition, planning and delivery. 
Spherical target volume and rectangular 
insert volume can be individually filled through 
separate fill ports using MRI or PET compat
ible liquids. Cube is aligned with external MRI/
CT fiducials.
The brain-equivalent cubic insert contains a 
5 mm diameter tungsten BB at the centroid 
and an additional 5 mm BB that is offset from 
center in three orthogonal planes at x-y-z 
distances of 15 mm, 20 mm, and 25 mm 
respectively. The insert facilitates isocenter 
verification (Winston Lutz) and couch shift 
localization/repositioning. The insert can be 
used by itself or inside the head for “blind” 
Winston Lutz tests.
Features:
• Use in tandem with other spherical   
target inserts
• Target volume and surrounding region  
can be filled separatelyMRI/PET/CT ORGANIC TARGET INSERTS FOR DEFORMABLE IMAGE REGISTRATION 
MODEL 038-12 & 038-13
Two MRI/PET/CT Organic Target Inserts are 
available for experimental testing of TPS de
formable image registration and transforma
tion algorithms. The Model 038-12 contains 
an organic shaped target of 25cc internal 
volume. In Model 038-13 the same organic 
target shape is isotropically reduced to a 
12.5cc internal volume. Both targets contain 
the same central position relative to the 
phantom’s external MRI/ CT fiducials. The 
target volumes and rectangular volumes can 
be filled individually through separate fill ports 
using MRI or PET compatible liquids.
25cc Organic Target CT
MRI/PET/CT SPATIAL 3D DISTORTION INSERT 
MODEL 038-14
The MRI/PET/CT Spatial 3D Distortion insert 
contains a 3D grid (13 x 13 mm spacing) 
of Ø 1.6 mm high contrast wire (more than 
200HU). The insert can be filled with MRI or 
PET compatible liquids. It provides a single, 
precise tool to check image fusion and im
age distortion across multiple modalities. 
To align internal grid with external MRI/CT 
f
iducials, please position insert with fill ports 
Features:
12.5cc Organic Target CT
• Quick and intuitive image fusion algorithm  
verification
• Can be used in tandem with external 
f
iducials for 3D distrotion assessment