An intuitive tool offering comprehensive testing capabilities. Perform end‑to‑end motion management QA using intuitive software that precisely controls motion and enables the use of patient‑specific waveforms.

Compatible with: Adaptive, C-arm linacs, CBCT, CT Simulation, Bore-type linacs, Hypersight, IGRT, Motion Management, Small Field Dosimetry, SGRT, Helical linac, TG51, TG142, Machine Targeting

Used for: Imaging QA RT, Commissioning and Annual QA RT, Motion Management MQA

Truly Flexible, Modular Solution

Can be used either as a static, multi purpose body phantom V2.0 or paired with a respiratory motion assembly to suit diverse test scenarios.

Best for

✓ 4D CT and 4D imaging QA ✓ Gated treatment QA ✓ Motion management system validation ✓ Dose verification in moving Targets ✓ Linac latency testing for gating & tracking workflows

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.

Quantify beam response timing

Verify the delay between beam-on/off commands and linac response using a validated workflow. By measuring latency independently of acquisition and algorithm delays, clinical teams can benchmark machine performance, support motion-managed treatments, and detect performance drift over time.

Benefits:

Validate beam-on and beam-off timing for gating workflows
Support SRS and SBRT treatments requiring tight margins
Benchmark linac performance across systems
Detect latency changes before they impact clinical treatments
Eliminate complex oscilloscope-based measurement setups

When timing isn't verified, accuracy is at risk

In motion-managed treatments such as gating, tracking, and breath-hold techniques, treatment accuracy depends not only on motion detection but also on how quickly the linac responds. Delays between beam-on/off commands and radiation delivery can affect target coverage and increase dose to healthy tissue, particularly in SRS and SBRT treatments where margins are extremely small.

The QUASAR pRESP 2.0 Latency Test enables standardized verification of linac response timing using validated pulse signals. By separating linac latency from acquisition and algorithm delays, clinics can accurately benchmark machine performance, monitor changes over time, and support compliance with recommended QA procedures

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.

Features

End-to-End Dosimetric Confidence

Ensure accuracy in motion-affected treatments with our new water-equivalent phantom. Featuring 6+ ion chamber positions and customizable drillable inserts, it empowers clinicians to precisely measure and verify delivered dose. Resulting in greater confidence in system performance and trust that patients are receiving the treatment exactly as intended.

Simplicity

An easy-to-use phantom with comprehensive testing capabilities for demanding motion protocols in modern radiation therapy departments. From its manual operation mode to its magnetic insert connection, QUASAR pRESP 2.0 is designed with the end user in mind, providing an intuitive motion-management QA tool.

Motion Control Options

Users can select between local manual control at the motor or advanced, software-driven programmability. The phantom supports simple translational motion or complex 3D trajectories when paired with the QUASAR [DH1] Respiratory Motion Rotation Stage (ITEM# 500-3330). Patient-specific waveform testing elevates QA by pushing the limits of motion management systems under realistic conditions.

Motion Precision

Accurate tumor targeting in motion-affected treatments depends on precise respiratory motion replication. QUASAR pRESP 2.0 exhibits detailed sensitivity when replicating captured or created waveforms. A highly responsive motor repositions the translation stage every 10 ms (100x per second) providing real-life breathing replication. Waveforms from 0 to 60 BPM are replicated with ease, testing a large range of clinical protocols. The phantom meets AAPM TG-76 and TG-324 recommendations, ensuring reproducibility and reliability across evolving radiotherapy techniques.

Versatility

QUASAR pRESP 2.0 supports a wide library of interchangeable inserts including water-equivalent, tissue-equivalent, and acrylic options, enabling validation across CT, linac, and PET workflows. Inserts accommodate ion chambers, film cassettes, and OSLD holders for end-to-end dosimetry and Imaging QA. pRESP provides users with the flexibility to operate it as a static phantom or integrate it with the responsive motor and software for motion-guided applications.

Software and Workflow Efficiency

Included with the phantom is the QUASAR Respiratory Motion QA Software that provides intuitive, programmable motion control. Users can create, customize, 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.

Complex Motion Control Options

With software-driven motion profiling, users can eliminate uncertainty in QA. From simple periodic motions for quick checks to complex 3D waveform playback for advanced validation, the system adapts to the complexity of clinical needs. This flexibility ensures confidence in system accuracy and patient safety.

Customizable Waveforms

Beyond its extensive pre-loaded waveform library, the software accepts imported data from major respiratory gating and tracking systems. Fully customizable editing tools allow physicists to refine waveform characteristics for protocol-specific testing, ensuring precise replication of clinical scenarios.

Accessories and Technical Specifications

Technical specifications

Body Oval: 30 cm wide, 20 cm high, 12 cm long, RW3, 4.3 kg.
Drive unit :30 cm long, 30 cm wide, 12 cm high, 4 kg, RW3 in field of view.
Respiratory Phantom mass: approximately 11 kg with Body Oval and all options.
Three openings in Body Oval for static insert, drive unit and moving Insert, 8 cm diameter.
Chest Wall Platform; 13 cm diameter, carries up to 1 kg.
Power Supply; Input, 100–240VAC, 47–63 Hz, International power cords available on request. Output, 24VDC, 2.1 A, 50 W. Approvals; CE, cUL
User's guide.

Optional Accessories

Beam Signal Processor (BSP)
RESP-Rotation Stage
Electron Density Ring water equivalent
MP/pRESP-Two Piece holder for MOSFET

Minimum Technical Requirements

Operating System: Windows 10 or 11.
Ports: 1 Ethernet.

QUASAR™ Respiratory Motion Phantom

1-Phantom
1-Software License

Optional Inserts

Additional RW3 Ion Chamber Holder- MP, RESP (major suppliers available on request)
Dummy Polystyrene Ion Chamber- (NE2571 0.60cc Farmer Type)
Cedar Insert with Solid Tumor centered
Cedar Insert with Solid Tumor (15 mm) centered
Cedar Insert with Solid Tumor (30mm) plus Gold Fiducials -centered
Cedar Insert with Solid Tumor centered- drilled for Ion Chamber
Cedar Insert with Solid Tumor (15 mm) centered-drilled for IC
Cedar Insert with Solid Tumor (30mm) with Gold Fiducials centered - Drilled for IC
Cedar Insert with Split Tumor centered- for Gafchromic film
Cedar Insert - Split - Centered 32 mm Cube Opening
Hollow Insert with screw cap (7.25cm inside diameter)
4D CT Imaging Insert
PET CT Insert
RW3 MP Insert Adapter
Offset-Cedar Insert with Solid Tumor
Offset Cedar Insert with Solid Tumor (15mm)
Offset Cedar Insert with Solid Tumor (30 mm) plus Gold Fiducials – for imaging
Offset-Cedar Insert with Solid Tumor- drilled
Offset Cedar Insert with Solid Tumor (15 mm) -drilled for IC
Offset Cedar Insert with Solid Tumour (30 mm) plus Gold Fiducials –drilled for IC
Offset-Cedar Insert with Split Tumor- for Gafchromic film
Offset-Cedar Insert with Split Tumor - Multiple OSLD Holder
Offset-Cedar Insert - drilled for Ion Chamber
Offset-Cedar Insert - Split - Offset 32 mm Cube Opening
Solid sphere with Gold Fiducials
Split Sphere with Gold Fiducials
RESP - Split Cedar Dual Target Insert - 30mm tumor in the offset position with adjacent 15mm tumour shifted 45degree towards the center
RESP - Cedar Insert - drilled for Ion Chamber (Centered)
MP-Spatial Resolution Insert (CT Imaging)
MP- Bone Rod with 5mm Titanium Rod Insert
MP-Cedar Ion Chamber Holder Insert (drilled)
Arcylic ion Chamber Holder
125/27cc dual cube insert (acrylic)
60 degree air wedge insert (acrylic)
20 degree air wedge, 5mm rod and 10mm rod insert (acrylic)
RW3 insert with offset tumour (30mm) drillable for ion chamber
Split RW3 Insert with 30mm and 15mm tumor targets

QUASAR pRESP 2.0