SBRT linear particle accelerator Accela

image-guided radiation therapywith multi-leaf collimator (MLC)with MLC

Overview
Accela is a software-driven radiation therapy delivery system engineered around NeoArc (Dynamic Modulated Arc Therapy, DMAT). It is designed to enable single breath-hold SBRT delivery, reduce time from imaging to beam-off, and support both on-couch and off-couch adaptive therapy. Accela aims to expand the range of treatable patients, increase precision, and reduce treatment and workflow time burdens on staff and patients.

Key benefits and positioning

• Enables single breath-hold treatments for SBRT, potentially reducing multiple breath-holds to one.
• Enables multi-site SBRT in very short delivery times, increasing access to high-quality care regardless of case complexity.
• Supports flexible adaptive workflows (online and offline) through Eclipse Neo integration, allowing the plan to be adapted to the moment.
• Narrows the window from imaging to beam-off to as low as ~90 seconds to reduce target shift risk.
• Single breath-hold CBCT acquisitions possible in as low as ~15 seconds to capture critical anatomy.

Product features

• NeoArc (DMAT) treatment technique: clinical goal–driven automation to balance plan quality, complexity, and delivery time for each patient.
• High-speed gantry and direct-drive gantry system enabling fast rotation and precise motion control.
• Dual-layer MLC architecture with 186 high-speed leaves for precise beam shaping and advanced delivery.
• HyperSight large imaging panel (expanded field of view) to visualize more anatomy in a single acquisition and speed CBCT imaging.
• High-intensity FFF dose-rate modes and additional energy options to accelerate delivery.
• Integrated ecosystem with Eclipse Neo planning and ARIA CORE workflow connectivity (Eclipse Neo unlocks NeoArc planning and supports adaptive workflows).
• SiteSync remote visualization for secure, real-time remote collaboration and review of the treatment console across the hospital network.

Clinical workflow notes
Accela is presented as enabling faster, more precise treatment delivery while offering clinics flexible adaptation choices, automation where appropriate, and connectivity across planning and oncology management systems. The system emphasizes reducing time demands on patients (shorter breath-holds) and shortening the imaging-to-treatment interval to maintain alignment between imaging and beam delivery.

Technical specifications

• Treatment technique: NeoArc (Dynamic Modulated Arc Therapy, DMAT).
• Delivery: software-driven radiation therapy delivery system supporting single breath-hold SBRT and multi-site SBRT.
• Gantry: new direct-drive gantry system with precise motion control and reduced noise; gantry rotation speeds up to 2.5 RPM.
• Imaging panel: HyperSight imaging panel (86 × 43 cm) for expanded field of view and faster CBCT acquisition.
• CBCT acquisition: single breath-hold CBCT in as low as 15 seconds (HyperSight acquisition).
• Imaging-to-beam-off interval: can be narrowed to as low as ~90 seconds.
• MLC: Dual-layer MLC architecture with 186 high-speed leaves; effective central leaf width 3.75 mm.
• MLC leaf speed: up to 6.5 cm/s (maximum leaf speed).
• Dose rates / energies: high-intensity FFF modes with ability to deliver dose rates up to 4000 MU/min (presented also as 40 Gy/min) and additional 8 FFF energy (up to 3000 MU/min) to expand delivery capability.
• Gantry clearance: 1 meter gantry clearance enabled by dual-layer MLC design (eliminates need for conventional jaws).
• In-room monitor: integrated in-room monitor within the gantry for streamlined review of patient, imaging, and treatment information.
• Adaptive therapy: supports full on-couch and off-couch adaptive therapy workflows; flexible adaptive enabled by Eclipse Neo and HyperSight, leveraging automation and AI where appropriate.
• Automation & workflow integration: Eclipse Neo (planning) is embedded within ARIA CORE for connected workflows; supports personalization, automation, and synchronization across systems.
• Remote collaboration: SiteSync enables secure, real-time remote visualization of the treatment console to support review and approval workflows.
• Regulatory / availability note: 510(k) pending. Not available for sale in any market.