Catalyst HD

The Precise Answer to Stereotactic Radiation Therapy
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The Precise Answer to Stereotactic Radiation Therapy

The capability of linear accelerators to deliver higher doses for SRT is increasing and it is expected that this technique will be applied more widely in clinical settings. To deliver even higher doses, new technology must be provided that is compatible with stereotactic delivery, namely high-precision patient positioning and intra-fraction motion management.

Catalyst HD offers a complete Surface Image Guided Radiation Therapy (SIGRT) solution on SRT for online patient tracking before and during treatment delivery, thus ensuring the best possible treatment outcome without non-prescribed doses. The Catalyst HD can also be used for VMAT, IMRT and 3D CRT delivery.

Real-time Surface Image Guided Solution with Submillimeter accuracy

Provide real time SIGRT through the treatment workflow, from Setup and Positioning, Intra-Fraction Motion Monitoring to Respiratory Gating Treatment with submillimeter accuracy for non-coplanar treatment
Patented color map projected on patient body during setup.
Dedicated Stereotactic Module is available for SRS/SBRT delivery.
Large patient surface coverage (1300x800x700mm) with optimal 360-degree coverage, fully support non coplanar delivery.
During treatment, the patient is constantly under surveillances by Catalyst HD.

High level of patient safety and comfort

Audio-visual coaching through in-room speakers and video solution, assisting the patient to follow the optimal breathing pattern.
Dose-free motion management
No markers on or around the patient

Sophisticated software to streamline the workflow

Multi-vendor interfaces have been developed to ensure a seamless clinical workflow, i.e. Varian TrueBeam, C-series; Elekta VersaHD, Infinity, Synergy
All patient data is available from a central database in the network environment.

Increasing productivity without compromising treatment quality

Potential to improve quality and speed of the positioning process, for example, extremity sarcoma
Highly integrated QA/QC procedure – Daily QC within 5 minutes
Non-rigid algorithm avoids extra time for ROI design.


Registration method: Real-time, non-rigid with deformable models for computing 6 DOF isocentric shifts
Positioning accuracy: Within 0.5 mm for rigid body
Long term stability: 0.3 mm

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