IMRT Thorax Phantom

Model 002LFC

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 and complete system QA from CT imaging to dose verification.

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 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.*

  • 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 & other detectors*
  • Verify individual patient treatment plans

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.

NOTE: This product or an optional accessory of this product requires a CIRS dosimetry cavity code before an order can be placed. Please refer to the Dosimetry Cavity Codes document to identify the CIRS code for the probe you intend to use with this product.

Data Sheet

IMRT Thorax Phantom: Data Sheet

Dosimetry Cavity Codes

Cavity Codes for Dosimetry Devices


Rijken, James David; 'Improvements to the delivery and treatment planning of stereotactic body radiotherapy'. Queensland University of Technology. 2020; View
Zabihzadeh, M; Rahimi, A; Shahbazian, H; Razmjoo, S; Mahdavi, SR; 'Accuracy Evaluation of EPL and ETAR Algorithms in the Treatment Planning Systems using CIRS Thorax Phantom'. Journal of Biomedical Physics and Engineering. 2020; Shiraz University of Medical Sciences. View
Kolarević, Goran; Jaroš, Dražan; Marošević, Goran; Ignjatić, Dejan; Mirjanić, Dragoljub; 'Dosimetric verification of clinical radiotherapy treatment planning system'. Vojnosanitetski pregled. 2020; (0): 70-70. View
Saragih, Y; Lestariningsih, I; Mu’minah, IA; Soejoko, DS; 'Recognizing Intrapulmonary Lymph Node (IPLN) and Lymph Node in Soft Tissue Image from Low Dose Computed Tomography (LDCT) and Standard Dose Computed Tomography (SDCT): Study Using CIRS Phantom'. Journal of Physics: Conference Series. 2020; 1505 (1): 12043. IOP Publishing. View
Kumar, Lalit; Kishore, Vimal; Bhushan, Manindra; Kumar, Pawan; Kumar, Gourav; 'Design and fabrication of a thoracic phantom for radiation dose verification in mega-voltage X-ray beam'. Materials Today: Proceedings. 2020; View
Yazdani, Samira; Takabi, Fateme Shirani; Nickfarjam, Abolfazl; 'The Commissioning and Validation of EclipseTM Treatment Planning System on a Varian VitalBeamTM Medical Linear Accelerator for Photon and Electron Beams'. Frontiers in Biomedical Technologies. View
Radojcic, Djeni Smilovic; Casar, Bozidar; Rajlic, David; Kolacio, Manda Svabic; Mendez, Ignasi; Obajdin, Nevena; Debeljuh, Dea Dundara; Jurkovic, Slaven; 'Experimental validation of Monte Carlo based treatment planning system in bone density equivalent media'. Radiology and Oncology. 2020; 54 (4): 495-504. Sciendo. View
Rojas-López, JA; Agüero, H; Mancuzo, A; Binia, S; 'Out-of-field dosimetry in IMRT with OSL'. AIP Conference Proceedings. 2021; 2348 (1): 50021. AIP Publishing LLC. View
Kolarevic, Goran; Jaroš, Dražan; Pavičar, Bojan; Ignjć, Tatjana; Kostovski, Aleksandar; Marosevic, Goran; Predojević, Branko; Mirjanić, Dragoljub; 'Computed tomography simulator conversion curve dependence on scan parameters and phantom dimension'. Journal of Health Sciences. 2021; View

Summary: The paper describes commissioning of a Varian Halcyon 1.0 linear accelerator, in which the Model 62M was used to calibrate CBCT image data to electron density units for the Eclipse Treatment Planning System while final end-to-end testing was performed using the Model 002LFC IMRT Thorax Phantom.
Yang, Bo; Yu, Lang; Wang, Zhiqun; Wang, Bei; Li, Wenbo; Zhang, Jie; Zhang, Xin; Wu, Zhufeng; Zhou, Zongkai; Sui, Hui; 'Experience on Commissioning the first Halcyon Linear Accelerator in China'. 2020; View
Hu, Yunfei; Byrne, Mikel; Archibald-Hareen, Ben; Collett, Nick; Liu, Guilin; Aland, Trent 'Validation of the preconfigured Varian Ethos Acuros XB Beam Model for treatment planning dose calculations: A dosimetric study.'. Journal of Applied Clinical Medical Physics. 2020; View
NIAMSAWAN, SASIPRAPA; Sookpeng, Supawitoo; 'The Impact of the variation of computed tomography simulation parameters to dose calculation in computer treatment planning for lung cancer patient'. 2021; Naresuan University. View
Salas Ramirez, Maikol; 'Methods to Improve Bone Marrow Dosimetry in Molecular Radiotherapy'. Julius-Maximilians-Universität Würzburg. View


Model: 002LFC Modality: