Authorised Indian Distributor
Saxsons Group
New Delhi, India · Since 1997
TruPose™ Head AdjusterBore-Linac 6DoF for Intracranial SRS / SRT
A 4DoF couch leaves three rotations on the table — pitch, roll and yaw. SGRT sees them; without a robotic couch you can't act on them. TruPose closes that gap on bore-class linacs with three colour-coded knobs at the base of the neck and ±4.0° of range on each axis.
Key Features
- Three colour-coded ergonomic knobs — pitch, roll and yaw, ±4.0° on each axis
- Base-of-neck ball-joint rotation point — keeps the head pivot anatomically natural
- Carbon-fibre construction (3.5 kg static) — radiolucent across CT, CBCT and MV imaging
- Two-pin indexing bar for repeatable inter-fraction setup on the treatment couch
- Compatible with S-type, Orfit 3-Point and Macromedics DSPS thermoplastic mask systems
All Features
- Three colour-coded ergonomic knobs — pitch, roll and yaw, ±4.0° on each axis
- Base-of-neck ball-joint rotation point — keeps the head pivot anatomically natural
- Carbon-fibre construction (3.5 kg static) — radiolucent across CT, CBCT and MV imaging
- Two-pin indexing bar for repeatable inter-fraction setup on the treatment couch
- Compatible with S-type, Orfit 3-Point and Macromedics DSPS thermoplastic mask systems
- Works with all surface-guided radiation therapy (SGRT) systems — visual-feedback adjustment loop
- Designed for bore-class linacs without robotic couches — Varian Halcyon, Varian Ethos, Accuray Radixact
- 15 kg head-plate load capacity covers the head + mask + immobilisation cushion mass
- Lightweight and compact — fits inside the bore-class linac aperture
- Available through Saxsons Group with CDSCO medical-device import registration — passive carbon-fibre head-adjuster accessory; no AERB licence required for the device itself
Technical Specifications
| Added degrees of freedom | 3 DoF (pitch, roll, yaw) — combines with 3DoF couch translations for full 6DoF setup |
| Adjustment range | ±4.0° on each rotational axis |
| Point of rotation | Base of neck, via ball joint |
| Construction | Carbon fibre (radiolucent) |
| Weight (static) | 3.5 kg |
| Maximum head-plate load | 15 kg (head + mask + cushion) |
| Overall dimensions | 545 × 345 × 140 mm |
| Couch interface | Standard two-pin indexing bar |
| Mask system compatibility | S-type, Orfit 3-Point, Macromedics DSPS |
| Linac compatibility | Bore-class — Varian Halcyon, Varian Ethos, Accuray Radixact |
| SGRT compatibility | All commercial SGRT systems (visual-feedback adjustment) |
| Knob design | Colour-coded ergonomic — one per rotational axis |
Applications
Where the missing three degrees actually bite
Intracranial SRS — single-isocentre, multi-target
For single-isocentre / multi-metastasis treatments, residual yaw of 1° translates into geometric miss that scales linearly with the target-to-iso offset. Zeroing the SGRT-reported rotation before beam-on protects every off-iso target equally.
Head-and-neck SRT
Fractionated SRT for cranial / base-of-skull targets benefits from inter-fraction reproducibility. The two-pin indexing bar + carbon-fibre frame ride the couch the same way every day; the three knobs zero the residual rotation per fraction.
Bore-class linac without a robotic couch
Halcyon, Ethos and Radixact ship with translation-only couches. TruPose adds the three missing rotations without the cost, footprint or QA overhead of a HexaPOD-class robotic system.
SGRT visual-feedback loop
SGRT reports the residual pitch/roll/yaw delta in real time. TruPose closes the loop: read the delta on the SGRT monitor, turn the matching colour-coded knob until it reads zero. No imaging dose.
Frameless cranial radiosurgery
Thermoplastic-mask frameless SRS replaces invasive head frames but historically left rotational corrections unaddressable on bore-class linacs. TruPose is the missing rotational link in a frameless workflow.
Why TruPose?
Bore-class linacs ship with translation-only couches. TruPose adds the three rotational degrees of freedom so the SGRT-reported delta is something you can act on — without a robotic couch.
Covers the residual rotational error budget documented in Dhabaan 2012 (max yaw ~1° after 6DoF correction). Four times the published worst-case residual gives margin for setup reality.
Light enough for the radiation therapist to move between fractions, rigid enough to hold setup under the head + mask + cushion mass. Radiolucent across CT, CBCT and MV imaging — no beam-attenuation surprises.
Catalogs & Resources
Manufacturer product page. The peer-reviewed evidence for bore-linac rotational correction is on the Knowledge Hub.
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TruPose™ Head Adjuster
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For Medical Physicist
Closing the 3DoF rotational gap on bore-class linacs
Bore-class linacs (Halcyon, Ethos, Radixact) have 4DoF couches — translations plus a single rotation. SGRT reports the residual pitch/roll/yaw deltas. Without a robotic couch, how big does a 1° residual rotation actually look in the dose distribution for a 1.5 cm intracranial target, and where does TruPose plug into the workflow? Sourced to Dhabaan 2012 (4DoF vs 6DoF dose impact) + Liu 2015 (motion-correction tolerances).
Read thisMedical PhysicistUpgrading a standard board to SRS — why TruPose is the right path
A clinic with a standard radiotherapy positioning board wants to deliver single-iso multi-met VMAT-SRS. At 1°, 7 % of targets drop below D95 95 % (Roper 2015); at 2°, only 63 % retain coverage. Three upgrade paths exist — robotic couch, head frame, or TruPose + open-face mask + SGRT. Which is right for a bore-class linac? Sourced to Roper 2015, Selvan 2019, Han 2022, Dhabaan 2012 and AAPM TG-147.
Read thisFAQ
TruPose 6DoF head adjuster — questions we hear from Indian medical-physicist teams
Why bore-class linacs miss rotational corrections, how TruPose adds pitch / roll / yaw without a robotic couch, whether ±4° covers the SGRT residual, and how the device fits standard mask systems.
Q.Why does a bore-class linac struggle with intracranial SRS accuracy?
Bore-class linacs (Varian Halcyon, Ethos, Accuray Radixact) ship with translation-only couches — three degrees of freedom (X / Y / Z) but no rotational correction (pitch, roll, yaw). Modern SGRT (surface-guided radiation therapy) systems report the residual rotational delta in real time, but on a translation-only couch there is nothing to act on that reading. A 1° residual yaw on a single-isocentre multi-metastasis SRS plan translates linearly into a geometric miss that scales with the target-to-iso offset — the off-iso target moves out from under the plan.
Q.How does TruPose close the 6DoF gap without a full robotic couch?
TruPose adds the three missing rotational degrees of freedom (pitch, roll, yaw) as a mechanical head-adjuster with ±4° per axis. The therapist reads the SGRT delta, dials the matching colour-coded knob until the value zeros, then treats. The rotational correction is applied at the head plate — no imaging dose, no robotic couch, no capital-equipment tier upgrade. Bore-class SRS becomes a 6DoF workflow.
Q.Does ±4° cover the residual rotational error that SGRT actually reports?
Dhabaan 2012 (CBCT-based 6DoF positioning study) documented a maximum yaw of around 1° after 6DoF correction on frameless cranial SRS. ±4° gives a four-times margin over the published worst-case residual — plenty of range for the setup reality across the fraction series.
Q.Is TruPose compatible with standard thermoplastic mask systems?
Yes. The head plate carries the standard S-type, Orfit 3-Point and Macromedics DSPS mask-clip patterns. The department does not swap masks — the existing frameless SRS mask workflow drops onto the TruPose head plate and the rotational correction is added on top.
Q.How is TruPose supplied and supported in India?
TruPose is distributed across India by Saxsons Group. Supply covers the head adjuster, colour-coded knob set, standard couch-bar indexing bar and mask-compatibility hardware. Passive carbon-fibre accessory — no AERB licence required for the device itself; CDSCO medical-device import registration handled by Saxsons.
TruPose Head Adjuster supplier in India — Saxsons Group
Saxsons Group has supplied radiotherapy equipment to over 1,000 Indian hospitals since 1988. Every consignment of TruPose Head Adjuster ships with cold-chain logistics, AERB import documentation, CDSCO registration references and a Certificate of Analysis delivered before dispatch — the paperwork your radiation-safety and procurement teams need, pre-assembled.
- Nationwide delivery footprint — every metro and tier-2 city in India, scheduled to your treatment / procedure calendar.
- AERB & CDSCO documentation — import licence, radiation-safety paperwork and RSO briefing pre-assembled for the audit file.
- 40+ years in Indian oncology — long-standing supply relationships with AIIMS, Tata Memorial, and hundreds of tertiary-care centres.
- Single point of accountability — one purchase order, one delivery contact, one after-sales team across the whole product family.
Also supplied by Saxsons Group across India
Close the rotational gap on your bore-class linac SRS programme
Contact Saxsons Group for pricing, demo arrangement, CDSCO medical-device import documentation and installation support for the TruPose Head Adjuster.