Authorised Indian Distributor
Saxsons Group
New Delhi, India · Since 1997
SBRT Immobilization SystemIndexed Platform + Bridges + T-Vacuum Cushion + Indexing Bar + Respiratory Belt
Complete stereotactic body radiation therapy immobilisation system — couch-indexed platform with belly bridge, knee bridge, wing-board T-grip, knee + feet cushion, elevation cushion, T-shaped vacuum cushion, carbon-fibre headrest, lockable indexing bar and respiratory belt. The full ten-component chain that AAPM TG-101 expects for lung, liver, abdomen, pelvic and spine SBRT delivery. Clear scale marks on every adjustable component for fraction-to-fraction reproducibility; quick-lock / unlock bridges for fast setup; compatible with all major linac couch-tops.
Key Features
- Comprehensive ten-component SBRT immobilisation system — every layer of the AAPM TG-101 chain is in the box
- Indexed SBRT platform locks onto the linac and simulator couches at the standard couch-bar pitch — same indexing across CT-sim and treatment
- Belly bridge — adjustable belly compression for abdominal SBRT; restricts respiratory excursion and shrinks the ITV-to-PTV margin
- Knee bridge — knee elevation paddle with left/right and vertical adjust; locks femoral rotation and pelvic tilt for pelvic SBRT
- Wing-board T-grip — above-head arm-support T-grip keeps both arms out of the chest/abdomen field; DIBH-compatible ergonomics for breath-hold workflows
All Features
- Comprehensive ten-component SBRT immobilisation system — every layer of the AAPM TG-101 chain is in the box
- Indexed SBRT platform locks onto the linac and simulator couches at the standard couch-bar pitch — same indexing across CT-sim and treatment
- Belly bridge — adjustable belly compression for abdominal SBRT; restricts respiratory excursion and shrinks the ITV-to-PTV margin
- Knee bridge — knee elevation paddle with left/right and vertical adjust; locks femoral rotation and pelvic tilt for pelvic SBRT
- Wing-board T-grip — above-head arm-support T-grip keeps both arms out of the chest/abdomen field; DIBH-compatible ergonomics for breath-hold workflows
- Knee + feet cushion — conformal lower-leg support under the knee bridge; reproducibility beyond the bridge alone
- Elevation cushion — variable-height head and shoulder elevation for thoracic SBRT diaphragm-baseline reproducibility
- T-shaped vacuum cushion — bead-fill conformal hold under vacuum; locks the patient outline at simulation, reproduces the shape every fraction
- Carbon-fibre headrest — radiolucent low-attenuation head support; reproducible cervical-spine curvature across fractions
- Lockable SBRT indexing bar — locks the platform to the couch at a defined position; reproduces the planning isocentre fraction-to-fraction
- Respiratory belt — pairs with 4D-CT or DIBH gating; sets the per-patient motion-management baseline
- Quick-lock / unlock bridge system — single-action lock; operator sets up in seconds, no fiddly screw cycle
- Clear scale marks on every adjustable component — reproducibility reads from the scale, not from feel
- Universal couch-top adapters — drop-in fit for the major linac couch-tops; same SBRT platform across vendor brands
- Compatible with S-Type thermoplastic mask for combined head + body SBRT workflows
- AAPM TG-101 and TG-178 immobilisation framework anchors the validation programme
Technical Specifications
| System composition | Ten-component SBRT chain (platform, belly bridge, knee bridge, wing-board T-grip, knee+feet cushion, elevation cushion, T-vacuum cushion, headrest, indexing bar, respiratory belt) |
| Platform indexing | Locks onto standard couch-bar pitch; index reproducibility within < 1 mm at the lock position |
| Bridge adjustment | Quick-lock / unlock — left/right and vertical adjust; clear scale marks on every axis |
| Headrest material | Carbon-fibre radiolucent composite — typical 1–2 % attenuation at MV photon energies |
| T-vacuum cushion | Bead-fill polystyrene in airtight polyurethane outer; quick-release valve; hand + electric pump compatible |
| Respiratory belt | Surface motion-tracking belt — compatible with 4D-CT, DIBH gating and surface-guided RT (SGRT) systems |
| Couch compatibility | Universal adapters for the major linac couch-tops on the Indian and global market |
| Mask compatibility | S-Type thermoplastic mask integration for combined whole-body SBRT |
| Imaging compatibility | CT, MR and DRR planning workflows; kV-imaging compatible for daily CBCT verification |
| Compliance framework | AAPM TG-101 (SBRT), AAPM TG-178 (immobilisation methodology), AAPM TG-176 (dosimetric handling) |
| Regulatory status (India) | Passive non-radioactive accessory — CDSCO Medical Devices Rules 2017 import registration; the system itself does not need AERB licensing (that sits on the linac facility) |
| Documentation | Per-batch material certificate, dosimetric-attenuation report, IQ / OQ / PQ protocols |
Applications
Five SBRT treatment workflows the ten-component system covers — plus the inspection-ready evidence chain
Lung SBRT
Platform + T-vacuum cushion + wing-board T-grip + respiratory belt. The respiratory belt sets the 4D-CT or DIBH baseline; the platform locks indexed position; the cushion locks the patient outline. ITV-to-PTV margin per AAPM TG-101.
Liver / abdomen SBRT
Platform + T-vacuum cushion + belly bridge + respiratory belt + wing-board T-grip. The belly bridge restricts respiratory excursion; DIBH workflows lock the breath-hold patient shape; daily CBCT verifies setup.
Pelvic / oligometastatic SBRT
Platform + T-vacuum cushion + knee bridge + knee+feet cushion. Knee bridge locks femoral rotation and pelvic tilt; cushion locks buttock and posterior pelvic shape; ideal for pelvic nodal and bone SBRT.
Spine SBRT
Platform + T-vacuum cushion + elevation cushion + carbon-fibre headrest. Spine SBRT cord-sparing dose-fall-off needs sub-mm reproducibility; the elevation cushion sets the supine-aligned baseline; daily CBCT confirms.
Combined H&N + body SBRT
Platform + S-Type thermoplastic mask + T-vacuum cushion. For SBRT workflows that need head-and-neck immobilisation alongside body-site SBRT — mask locks the upper-body shell; platform + cushion locks the rest.
Inspection-ready evidence chain
Per-batch material certificate + dosimetric-attenuation report + IQ / OQ / PQ protocols + per-fraction setup log. Ready for facility QA + medical-physics audit. The passive-accessory dossier plugs into the linac facility's own AERB licence — the SBRT system itself does not need a separate AERB permit.
Why SBRT Immobilization System?
Every layer of the AAPM TG-101 SBRT immobilisation chain — platform, bridges, cushion, mask compatibility, indexing, respiratory belt, accessories — supplied as one system. No mix-and-match procurement; no compatibility risk between vendors; the SBRT chain ships pre-validated.
Belly and knee bridges have single-action quick-lock; the platform locks to the couch in one motion via the indexing bar. The full setup — platform, bridges, cushion, belt, mask — completes in under 10 minutes for a trained operator. SBRT room throughput stays inside the daily fraction schedule.
Every adjustable component carries clear scale marks. The per-patient setup configuration is recorded once at the simulation visit; every subsequent fraction reproduces the recorded values exactly. Inter-fraction reproducibility is what AAPM TG-101 expects at SBRT dose levels.
Variant matrix
Ten components, four SBRT workflows, one chain
The system ships as a complete ten-component chain. The per-site build sheet configures which components engage for the workflow — lung needs the wing-board T-grip; abdomen adds the belly bridge; spine pairs the elevation cushion. The Accessories Matrix below covers the quick-lock and indexing details.
Ten-component SBRT chain
| SBRT platform | Indexed couch-side base shell — locks onto the linac and simulator couches at the standard pitch; the SBRT chassis everything else mounts on |
| Belly bridge | Adjustable belly compression for abdominal SBRT — restricts respiratory excursion to shrink the ITV margin |
| Knee bridge | Knee elevation paddle with left/right and vertical adjust — locks femoral rotation and pelvic tilt for pelvic SBRT |
| Wing-board T-grip | Above-head arm-support T-grip — keeps both arms out of the chest / abdomen treatment field, DIBH-compatible ergonomics |
| Knee + feet cushion | Conformal cushion that supports the lower legs under the knee bridge — improves comfort + adds reproducibility beyond the bridge alone |
| Elevation cushion | Variable-height head and shoulder elevation — used in thoracic SBRT to drop the diaphragm into a reproducible expiration baseline |
| T-shaped vacuum cushion | Conformal-hold cushion shaped to the SBRT body region; the bead-fill locks under vacuum into the patient outline |
| Carbon-fibre headrest | Radiolucent low-attenuation head support — reproducible cervical-spine curvature across fractions |
| SBRT indexing bar | Lockable index bar that locks the platform to the couch at a defined position; reproduces the planning isocentre fraction-to-fraction |
| Respiratory belt | Surface respiratory-motion belt — pairs with 4D-CT or DIBH-gating to set the breath-hold or motion-management baseline |
Per-site build sheet
| SBRT site | Target | Configuration |
|---|---|---|
| Lung SBRT | Peripheral and central lung nodules; 4D-CT-derived ITV or DIBH | Platform + T-vacuum cushion + wing-board T-grip + respiratory belt |
| Liver / abdomen SBRT | Liver, kidney, adrenal metastases; DIBH or breath-hold | Platform + T-vacuum cushion + belly bridge + respiratory belt + wing-board T-grip |
| Pelvic / oligometastatic SBRT | Pelvic nodal or bone SBRT; free-breathing | Platform + T-vacuum cushion + knee bridge + knee+feet cushion |
| Spine SBRT | Vertebral SBRT; cord-sparing dose-fall-off requirement | Platform + T-vacuum cushion + elevation cushion + carbon-fibre headrest |
Accessories Matrix
| Quick-lock / unlock bridge system | Single-action lock for belly and knee bridges — operator sets the patient position in seconds, no fiddly screw cycle |
| Clear scale marks on every adjustable component | Reproducibility across fractions reads from the scale, not from feel; the operator records the per-patient setting once and reproduces it every day |
| Couch-top adapters (universal) | Drop-in fit for the major linac couch-tops on the Indian and global market; same SBRT platform across vendor brands |
| S-Type thermoplastic mask compatibility | For SBRT workflows that pair the body platform with head-and-neck mask immobilisation (combined whole-body SBRT) |
| Pairing with Vacuum Cushion (RT-020) | Standard chain — SBRT platform + T-shaped vacuum cushion form the conformal-hold layer that AAPM TG-101 expects on body-site SBRT |
| Indexing strap | Locks the T-shaped vacuum cushion onto the platform at the indexed position; setup transfers from CT-sim to linac without per-room recalibration |
Per-batch material certificate and dosimetric-attenuation report ship with every system. Couch-top adapter specified to the receiving linac during site IQ / OQ.
Catalogs & Resources
AAPM references that anchor the SBRT immobilisation chain. Contact Saxsons for India pricing, couch-top adapter selection and IQ / OQ / PQ documentation.
AAPM TG-101 — Stereotactic Body Radiation Therapy
AAPM task-group report defining SBRT delivery framework and immobilisation expectations.
AAPM TG-178 — Methodology to determine the use of body immobilisation devices
AAPM task-group report on body immobilisation device characterisation and clinical-use methodology.
AAPM TG-176 — Dosimetric effects of couch tops and immobilisation devices
AAPM task-group report on dosimetric handling of immobilisation devices in the treatment beam path.
SBRT Immobilization System
More for this product
Each card opens a focused post for a specific specialty — peer-reviewed evidence and clinical workflow, written for the persona you select.
The complete SBRT immobilisation chain in one system
Contact Saxsons Group for SBRT system supply, couch-top adapter selection, accessory configuration, IQ / OQ / PQ documentation and CDSCO medical-device import registration.