IMRT Thorax Phantom CIRS 002LFC
Complete QA from CT imaging to dose verification

The CIRS Model 002LFC IMRT Thorax Phantom for Film and Ion chamber Dosimetry is designed to address the complex issues surrounding commissioning and comparison of treatment planning systems while providing a simple yet reliable method for verification of individual patient plans and delivery.

The 002LFC is elliptical in shape and properly represents an average human torso in proportion, density and two-dimensional structure. It measures 30 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 GafChromic® film. Additional inserts are available to support a variety of other detectors including TLD's, MOSFET, and diodes.

Handling, assembly and proper orientation of the phantom is made 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.*

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.

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 002 LFC 2

CIRS 002 LFC 3

CIRS 002 LFC Diagram

CIRS 002 LFC X-Ray Image

Specifications
Overall Dimensions 43.2 cm x 38.1 cm x 22.9 cm (17" x 15" x 9")
Weight 11.2 kg (30 lb)
Materials Phantom Body: Tissue Equivalent Epoxy Materials
Inserts: CIRS Tissue Equivalent Materials (epoxy resin based)
Model 002LFC Includes (1) Thorax section drilled to accommodate rod inserts
(12) 1 cm thorax sections
(1) 3 cm end section
(5) Water equivalent solid rod inserts (002RW-S)
(1) Bone equivalent solid rod inserts (002RB-S)
(4) Lung equivalent solid rod inserts (002RL-S)
(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
002RL-CVXX-XX - Lung equivalent rod insert with ion chamber cavity

Refer to separate CIRS cavity and plug code list for available chamber cavities.
Additional Options 002BR - Single breast attachment
002FC - Film stack for small volume 3D image reconstruction
002GC - Gel dosimetry cassette
002HCV - Homogeneous section that accommodates 002FC or 002GC cassettes
002LCV - Thorax region section that accommodates 002FC or 002GC cassettes
002SPH - Water equivalent rods for TLD's (set of 5 rods length 5cm)
002CTF - Set of CT to film fiducial markers for additional interfaces
002ED - Electron density reference plugs, set of 4 (lung, bone, muscle, adipose)
002SS-LFC - Thorax region spacer slab (1 cm)
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

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Schiefer H, Fogliata A, Nicolini G, et al. The Swiss IMRT dosimetry intercomparison using a thorax phantom. Medical Physics. 2010;37(8):4424-4431.

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Luo W, Yoo S, Wu Q, Wang Z, Yin F-FF. Analysis of image quality for real-time target tracking using simultaneous kV-MV imaging. Medical Physics. 2008; 35(12):5501-5509.

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Zhao Y-LL, Mackenzie M, Kirkby C, Fallone B. Monte Carlo evaluation of a treatment planning system for helical tomotherapy in an anthropomorphic heterogeneous phantom and for clinical treatment plans. Medical Physics. 2008; 35(12):5366-5374.

Polednik M, Madyan YA, Schneider F, et al. Evaluation of calculation algorithms implemented in different commercial planning systems on an anthropomorphic breast phantom using film dosimetry. Strahlentherapie und Onkologie : Organ der Deutschen Röntgengesellschaft ... [et al]. 2007; 183(12):667-672.

Altman M, Chmura S, Smith B, et al. SU-FF-T-40: A Novel Phantom for Use in 3-Dimensional in Vitro Cell Experiments. Medical Physics. 2006; 33(6).

Dobler B, Walter C, Knopf A, et al. Optimization of extracranial stereotactic radiation therapy of small lung lesions using accurate dose calculation algorithms. Radiation Oncology. 2006; 1(1).

Wertz, H., Stsepankou, D., Blessing, M, et al. Fast kilovoltage/ megavolates (kVMV) breathhold cone-beam CT for image guided radiotherapy of lung cancer. Phys. Med Biol. 55 (2010) 4203-4217.

Lehmann J, Kenny J, Lye J, Kron T, Williams I. Radiation Therapists and Level III audits by the Australian Clinical Dosimetry Service. Spectrum (Nov 2012): 14-17.

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Nodehi MR, Mahdavi S, Gholami S, Khosravi H, Asnaashari K. Dosimetric comparison of different inhomogeneity correction algorithms for external photon beam dose calculations. J Med Phys. 2013;38(2):74-81.

Feygelman V, Stambaugh C, Zhang G, et al. Motion as a perturbation: measurement-guided dose estimates to moving patient voxels during modulated arc deliveries. Med Phys. 2013;40(2):021708.

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Lopes MC, Cavaco A, Jacob K, et al. Treatment planning systems dosimetry auditing project in Portugal. Phys Med. 2013.

Park H, Suh T, Park J, et al. Verification of the grid size and angular increment effects in lung stereotactic body radiation therapy using the dynamic conformal arc technique. Journal of the Korean Physical Society. 2013;62(11):1672-1677.

Stevens SW, Rosser KE, Bedford JL. A 4 MV flattening filter-free beam: commissioning and application to conformal therapy and volumetric modulated arc therapy. Phys Med Biol. 2011;56(13):3809-24.

Lehmann J, Dunn L, Lye JE, et al. Angular dependence of the response of the nanoDot OSLD system for measurements at depth in clinical megavoltage beams. Med Phys. 2014;41(6):061712.
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