QUASAR™ Respiratory Motion Phantom pRESP 2.0

When Motion isn’t Managed, Confidence is Lost

The challenge

One of the greatest challenges in radiotherapy is managing respiratory motion. Tumors in the thoracic and upper abdomen can shift several millimeters during the breathing cycle. If left uncompensated, this motion compromises targeting accuracy, increases dose to surrounding healthy tissue and ultimately threatens treatment outcomes. Even with advanced technologies such as IGRT and SGRT, without rigorous QA, motion variability introduces uncertainty into every treatment delivered. Without efficient, reliable motion QA, clinicians spend more time managing risk instead of treating patients.

The solution

QUASAR Respiratory Motion Phantom 2.0 ( pRESP ) addresses these challenges directly.  As a programmable breathing and tumor motion simulator it allows physicists to perform end-to-end QA on motion-guided RT systems under clinically realistic conditions.

The phantom features a body oval and accessories made from water and tissue equivalent materials, replacing acrylic, to more accurately replicate patient conditions. This upgrade delivers higher-fidelity QA results and reduces the gap between phantom testing and true clinical performance, empowering physicists to verify that their systems are not just functioning but performing at the standard required for modern motion-guided radiotherapy.

Integrate your motion QA with the leaders in SGRT

QUASAR pRESP 2.0 is engineered for precision and clinical versatility. It aligns seamlessly with leading SGRT systems and supports motion tracking and gating via a dedicated chest wall surrogate. It offers:

• Optimized chest wall–to–linear motion ratio.
• 6+ ion chamber locations.
• Interchangeable solid water and lung-equivalent inserts.

This combination delivers a comprehensive QA platform for advanced motion management and treatment simulation.

The phantom is fully compatible with SGRT systems including Vision RT, C-RAD, Brainlab®, and Varian® Identify. Patient-specific waveforms can be imported from a wide range of motion capture and waveform generation tools, supporting formats such as VXP, CSV, TXT, DCM, LOG, DAF, and IMA.

Software and Workflow Efficiency

Included with the phantom is the QUASAR Respiratory Motion QA Software that provides intuitive, programmable motion control. Users can create, customise, and import motion profiles, including patient-specific waveforms. It also incorporates a Deep Inspiration Breath Hold (DIBH) testing mode, improving workflow efficiency for clinical teams validating advanced treatment techniques.

Varian^® and Brainlab^® are trademarks or registered trademarks of Varian Medical Systems, Inc. Use of them does not imply any relationship, sponsorship, or endorsement between IBA or its products and Varian Medical Systems, Inc.