IMRT Thorax  
Phantom
• Verify heterogeneity corrections
• Correlate CTU to electron density
• Check dose distributions in sensitive areas
• Check depth doses and absolute dose
• 2D and 3D isodoses
• Calibrate film with ion chamber and other detectors
• Designed to accommodate additional, optional   
  breast attachments
Complete QA from CT Imaging to Dose Verification 
The IMRT Thorax Phantom for film and ion chamber 
dosimetry is designed to address the complex issues 
surrounding commissioning and comparison of 
treatment planning systems and complete system QA 
from CT imaging to dose verification. Once the only 
way to do IMRT/VMAT QA, phantoms like the IMRT 
Thorax Phantom are used today for more intensive 
investigations especially during commissioning, 
research and end-to-end testing.
Tissue Equivalent Technology 
The phantom is elliptical in shape and properly 
represents an average human torso in proportion, 
density and two-dimensional structure. It measures 
29 cm long x 30 cm wide x 20 cm thick.  The phantom 
is constructed of proprietary tissue equivalent epoxy 
materials. Linear attenuations of the simulated tissues 
are within 1% of actual attenuation for water and bone, 
and within 3% for lung from 50 keV to 15 MeV.
Tissue equivalent interchangeable rod inserts 
accommodate ionization chambers allowing for 
point dose measurements in multiple planes within 
the phantom. Hole placement allows verification in 
the most critical areas of the chest. One half of the 
phantom is divided into 12 sections, each 1 cm thick, 
to support radiographic or GafchromicTM film. 
Additional inserts are available to support a variety 
of other detectors including TLD’s, MOSFET, and 
diodes.
Intuitive Setup
Handling, assembly and proper orientation of the 
phantom is easy with the use of a unique alignment 
base and holding device. The surfaces of the 
phantom are marked for ease of laser alignment. CT 
markers are included to ensure accurate film to plan 
registration on the center film.IMRT Verification and End-to-End Solution
The IMRT phantoms are manufactured from tissue equivalent materials that mimic within 1% from 50 keV to 15 MeV for 
accurate simulation during all necessary steps of IMRT verification. The interchangeable rod design allows the phantom to 
accommodate many dose measurement devices such as ion chambers, TLD, diodes and MOSFET’s in the same location 
within the phantom. Phantom cross sections accommodate GafchromicTM filmSpecifications
Dimensions 
assembled with 
holder
43.2 cm x 38.1 cm x 22.9 cm 
(17 ”x 15”  x 9”)
Weight 30 lbs (11.2 kg)
Materials
Phantom Body:  Tissue Equivalent Epoxy 
Materials
Inserts: Tissue Equivalent Materials  
(epoxy resin based)  
*Customers must complete their order with the purchase of at least 
one (1) insert option listed above. For best results, the full set is 
recommended. Refer to separate cavity and plug code list for available 
chamber cavities.
Insert Options
Part No. Description
002RW-CVXX-XX Water equivalent rod insert with ion chamber cavity
002RB-CVXX-XX Bone equivalent insert with ion chamber cavity
002RL-CVXX-XX Lung equivalent insert with ion chamber cavity
Optional Accessories
Part No. Description
002BR-2PK Set of 350cc breast attachments, predrilled in a  
3 cm x 3 cm grid to accommodate 8 TLD detectors 
002FC Film Stack for small volume 3D image reconstruction
020HCV Homogeneous section that accommodates 002FC or 
002GC cassettes
002LCV Thorax region section that accommodates 002FC
002SPH Water equivalent rods for TLD’s (set of 5 rods length 
5cm) 
002ED Electron density reference plugs, set of 4 (lung, bone, 
muscle, adipose)
9501
Case for IMRT Phantoms (002H9K, 002LFC, 002PRA) 
when ordered with corresponding Cavity Slab 
(002HCV, 002LCV, 002PCV)
9502 Case for IMRT Phantoms (002H9K, 002LFC, 002PRA)
158200-09 Precision Cut EBT3 Film Kit for Model 002FC  
(Set of 25 inserts plus 6 calibration strips