IMRT Pelvic 3D Phantom CIRS 002PRA
Complete QA from CT imaging to dose verification

The CIRS Model 002PRA IMRT phantom is designed to address the complex issues surrounding commissioning and comparison of treatment planning systems and verification of individual patient plans and delivery.

The CIRS 002PRA phantom properly represents human pelvic anatomy in shape, proportion and structure as well as density. This enables thorough analysis of both the imaging and dosimetry system. The phantom is constructed of proprietary tissue equivalent epoxy materials. Linear attenuations of the simulated tissues are within 1% of actual attenuation for bone and water from 50 keV to 15 MeV.

The phantom is elliptical in shape, approximates the size of an average patient, and has a tissue equivalent, three dimensional skeleton. Tissue equivalent interchangeable rod inserts for ionization chambers allow for point dose measurements in multiple planes in the phantom and film calibration.* The phantom also supports film dosimetry with not only standard radiographic films but also GafChromic® media. Additional inserts are available to support a variety of other detectors including TLD's, MOSFET, and diodes.

The Model 002PRA includes four different Electron Density reference plugs which can be interchanged in five separate locations within the phantom. The surface of the phantom is etched with grooves to ensure proper orientation of the CT slices and accurate film to plan registration.

Features IMRT Verification System

CIRS IMRT phantoms are manufactured from tissue equivalent materials that mimic within 1% from 50 keV to 15 MeV for accurate simulation from CT planning to treatment delivery. The interchangeable rod design allows the phantom to accommodate a multitude of dose measurement devices such as ion chambers, TLD, diodes and MOSFET's in the same location within the phantom. Phantom cross sections accommodate GafChromic® or standard ready-pack films.1

Refer to the cavity and plug code list for available chamber cavities.

The CIRS line of IMRT phantoms is compatible with the RIT 113 software for film to plan analysis. GafChromic® is a registered trademark of International Specialty Products, Wayne, NJ.

CIRS 002PRA Diagram



Overall Dimensions 35.6 cm x 38.1 cm x 22.9 cm (14" x 15" x 9")
Weight 10.5 kg (28 lb)
Materials Phantom Body: Tissue Equivalent Epoxy Materials
Inserts: CIRS Tissue Equivalent Materials (epoxy resin based)
Model 002PRA Includes (1) 5 cm tissue equivalent reference section for interchangeable ED inserts
(10) 1 cm thick contiguous 3D pelvic sections each drilled to accommodate rod inserts
(1) Homogeneous section that accommodates 002FC or 002GC cassettes (002HCV)
(1) Film stack for 3D reconstruction (002FC)
(5) Water equivalent rods, 2.5 cm Ø x 5 cm long
(20) Bone equivalent solid disks, 2.5 cm Ø x 1 cm thick
(30) Water equivalent solid disks, 2.5 cm ø x 1 cm thick
(1) Electron density reference plugs, set of 4: lung, bone, muscle, adipose (002ED)
(1) Set of CT to film fiducial markers
(1) Alignment Base
(1) Holding device
Insert Options *Customers are encouraged to complete their order with the purchase of
at least one (1) of each insert option listed below:

002RW-CVXX-XX - Water equivalent rod insert with ion chamber cavity
002RB-CVXX-XX - Bone equivalent rod insert with ion chamber cavity

Refer to separate CIRS cavity and plug code list for available chamber cavities.
Additional Options 9501 - Case for IMRT phantoms (002H5, 002H9K, 002LFC, 002PRA) when ordered with corresponding Cavity Slab (002HCV, 002LCV, 002PCV)
9502 - Case for IMRT phantoms (002H5, 002H9k, 002LFC, 002PRA)

Publication References

Wertz H, Jahnke L, Schneider F, Polednik M, et al. A novel lateral disequilibrium inclusive (LDI) pencil-beam based dose calculation algorithm: Evaluation in inhomogeneous phantoms and comparison with Monte Carlo calculations. Medical Physics. 2011; 38(3):1627-1634.
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