Dynamic Thorax Phantom

Model 008A

The CIRS Dynamic Thorax Phantom is a precision instrument for investigating and minimizing the impact of tumor motion inside the lung. It provides known, accurate and repeatable three-dimensional target motion inside a tissue equivalent phantom. It is designed for comprehensive analysis of image acquisition, planning and dose delivery in image-guided radiation therapy.

The phantom body represents an average human thorax in shape, proportion and composition. A lung equivalent rod containing a spherical target and or various detectors is inserted into the lung equivalent lobe of the phantom. The body is connected to a motion actuator box that induces three-dimensional target motion through linear translation and rotation of the lung equivalent rod. Motion of the rod itself is radiographically invisible due to its matching density with the surrounding material. The target and its motion, given its density difference, can be resolved.

Target and surrogate motion are independently controlled with CIRS Motion Control Software. The graphical user interface provides an unlimited variety of motions while simplifying the operation of the Dynamic Thorax Phantom to an intuitive level.

  • Complex 3D tumor motion within the lung
  • Sub-millimeter accuracy and reproducibility
  • Motion software enables different cycles, amplitudes and wave forms
  • Tissue equivalent from 50 keV to 125 MeV
  • Compatible with TLD, MOSFET, nanoDot(TM), Dose Gel, microchamber, PET/CT targets and film
  • Surrogate breathing platform accommodates numerous gating devices

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

Dynamic Thorax Phantom: Data Sheet


Dynamic Thorax Phantom: Brochure

Dosimetry Cavity Codes

Cavity Codes for Dosimetry Devices



Publication References:

Munoz, C., et al., Evaluation of Positional Accuracy in Moving Tumors Using a CIRS Dynamic Phantom. Poster presented, Cyberknife User’s Meeting January 2007.

Tanyi, James, A., et al., Phantom investigation of 3D motion-dependent volume aliasing during CT simulation for radiation therapy planning. Radiation Oncology, 2007, 2:10.

Chuang, C., et al., The use of a new dynamic motion phantom for patient specific QA in tracking therapy. 2006 AAPM Abstract ID No. 4639.

Wang, Z., et al., Verifying Internal Target Volume using Cone-Beam CT for Stereotactic Body Radiotherapy Treatment. 2006 AAPM Abstract ID No. 5263, Poster #: SU-EE-A1-4.

Tanyi, James, A., et al., Dosimetric Evaluation of Target Dose in Stereotactic Body Radiation Therapy (SBRT) of Lung Lesions Using a Dynamic Motion Anthropomorphic Phantom. 2004 AAPM PO-T-143 Poster.

Tanyi, James, A., et al., Phantom Investigation of Three-Dimensional, Motion-Induced Dose Discrepancy During Intensity Modulated Radiation Therapy Dose Delivery. Poster presented at 2006 annual AAPM meeting, Orlando FL, July 2006.

Tanyi, James, A., et al., Phantom Investigation of Three-Dimensional Motion Dependent Volume Aliasing During CT Simulation for Radiation Therapy Planning. Poster presented at 2006 annual AAPM meeting, Orlando FL, July 2006.

Varchena, V., et al., A novel Dynamic Thorax phantom for 3D-CRT and IMRT of lung le- sions. Radiotherapy & Oncology at Meeting, Vol. 76, Supplement 2, September 2005.