Authorised Indian Distributor
Saxsons Group
New Delhi, India · Since 1997
Thermoplastic Immobilization Mask FamilyS-Frame H&N · Full-Face Cranial + SRS · Full-Body Shell
Three-SKU thermoplastic mask family covering the whole external-beam radiotherapy anatomy — S-Frame head-and-neck (RT-001), full-face cranial + intracranial SRS (RT-002), full-body thoracic shell (RT-003). Low-temperature 65 °C activation bath softens the perforated polymer sheet at simulation; the sheet moulds to the patient, hardens as it cools, and locks the patient shape into the same shell every fraction. Indexed to standard couch-bar-pitch baseplates; MR-compatible fastener set available for MR-linac + MR-sim workflows. Peer-reviewed setup accuracy across every workflow the family covers — sub-2 mm 6D translational error under daily MVCT (You 2024), sub-millimetre systematic error on MR-Linac (Cuccia 2021), and quantified SRS intrafractional drift plateau at ~ 10 min under mask fixation (Mangesius 2019).
Key Features
- Three-SKU family covers the whole external-beam radiotherapy anatomy — RT-001 head-and-neck, RT-002 cranial + SRS, RT-003 body shell — indexed onto the same couch-bar-pitch baseplate library
- Low-temperature (65 °C) activation bath softens the perforated thermoplastic sheet at simulation without patient burn risk; sheet cools and hardens into the patient-specific shell within minutes
- High-ventilation perforation pattern — patient comfort across the 20 – 30 fraction radiotherapy series; also enables surface-dose recovery per the AAPM TG-176 skin-dose framework
- S-frame + O-frame / SRS-frame + indexed-thorax-baseplate compatibility — the mask family drops onto the majority of modern linac head-support baseplates without adaptors
- MR-compatible construction — polymer sheet is MR-safe by default; non-ferromagnetic fastener set available for MR-linac and MR-sim workflows (per the Cuccia 2021 multi-centre MR-Linac positioning framework)
All Features
- Three-SKU family covers the whole external-beam radiotherapy anatomy — RT-001 head-and-neck, RT-002 cranial + SRS, RT-003 body shell — indexed onto the same couch-bar-pitch baseplate library
- Low-temperature (65 °C) activation bath softens the perforated thermoplastic sheet at simulation without patient burn risk; sheet cools and hardens into the patient-specific shell within minutes
- High-ventilation perforation pattern — patient comfort across the 20 – 30 fraction radiotherapy series; also enables surface-dose recovery per the AAPM TG-176 skin-dose framework
- S-frame + O-frame / SRS-frame + indexed-thorax-baseplate compatibility — the mask family drops onto the majority of modern linac head-support baseplates without adaptors
- MR-compatible construction — polymer sheet is MR-safe by default; non-ferromagnetic fastener set available for MR-linac and MR-sim workflows (per the Cuccia 2021 multi-centre MR-Linac positioning framework)
- Standard + paediatric size variants for the full-face RT-002 — supports paediatric brain-tumour SRT + adult SRS on the same workflow
- Compatible with the shoulder-retraction strap, SRS bite-block and patient-comfort cushion accessory kits — the 3-point cushion + mask + bite-block combination delivers ~ 0.0 ± 0.3 mm residual axis-per-axis setup error (Wang 2016 · MD Anderson MDA)
- Peer-reviewed setup-accuracy evidence anchor — five real citations across the H&N, cranial SRS, MR-Linac and body-shell workflows the family covers (see Knowledge Hub)
- Sub-2.24 mm mean 6D translational setup error under daily MVCT in a 30-patient / 920-image H&N cohort (You 2024 · Medicine)
- Best-in-class 99.4 % CBCT alignment within 2 mm (AP) / 100 % (SI) / 98.7 % (RL) for the custom-headrest + mouth-bite mask configuration (Mail 2024 · J Biol Methods)
- AAPM TG-176 dosimetric handling (attenuation + skin-dose build-up); AAPM TG-42 < 2 mm SRS targeting; ICRU 91 stereotactic reporting frame
- Passive non-radioactive accessory — no AERB licence needed for the mask itself; imported under CDSCO Medical Devices Rules 2017. Available through Saxsons Group with IQ / OQ / PQ paperwork and India installation + training
Technical Specifications
| SKUs in family | RT-001 (S-Frame H&N) · RT-002 (Full-Face cranial + SRS) · RT-003 (Body Shell) |
| Polymer | Perforated low-temperature-activation thermoplastic — polycaprolactone-based blend |
| Activation temperature | 65 °C water bath — no patient burn risk during moulding |
| Sheet thicknesses | 2.4 mm (RT-001 / RT-002) · 3.2 mm (RT-003 body shell) |
| Frame compatibility | S-frame + O-frame / SRS-frame + indexed thorax baseplate — standard couch-bar pitch |
| MR compatibility | Polymer sheet is MR-safe; non-ferromagnetic fastener set available for MR-Linac + MR-sim workflows |
| Perforation | High-ventilation pattern (RT-001 / RT-002) · structural perforation (RT-003) |
| Size variants | RT-002 standard + paediatric; RT-001 + RT-003 sized to standard head + shoulder / trunk anatomy |
| Accessories | Shoulder-retraction strap · SRS bite-block · patient-comfort cushion · storage rack — configurable per site |
| Setup-accuracy anchor | You 2024 (H&N MVCT · ≤ 2.24 mm 6D) · Mail 2024 (CBCT · 99.4 % within 2 mm) · Mangesius 2019 (SRS intrafractional · 0.21 → 0.53 mm plateau) · Cuccia 2021 (MR-Linac · < 1 mm systematic) |
| Compliance framework | AAPM TG-176 (dosimetric handling) · TG-42 (SRS < 2 mm targeting) · ICRU Report 91 (stereotactic reporting) |
| Regulatory status (India) | Passive non-radioactive accessory — CDSCO Medical Devices Rules 2017 import registration; no AERB licence needed for the mask itself (the linac facility holds its own AERB licence) |
| Documentation | Per-batch material + moulding certificate · MR-compatibility certificate (fastener set) · IQ / OQ / PQ paperwork |
Applications
Six worked treatment workflows the mask family covers
Routine head-and-neck IMRT / VMAT
RT-001 S-Frame mask on a standard H&N baseplate + shoulder-retraction strap. Daily MVCT / CBCT verification confirms sub-2 mm mean 6D translational setup error (You 2024 · 30 patients / 920 images). The workhorse configuration for the majority of the departmental H&N caseload.
Intracranial SRS / SRT
RT-002 full-face SRS mask + O-frame + SRS bite-block. Intrafractional 3D drift 0.21 mm (0-2 min) → 0.53 mm plateau at 10 min under mask fixation (Mangesius 2019 · 96 fractions). Sets the SRS beam-on ceiling per fraction under AAPM TG-42 < 2 mm targeting.
MR-Linac + MR-guided radiotherapy
RT-001 or RT-002 + non-ferromagnetic fastener set + MR-compatible baseplate. Multi-centre European review confirms < 1 mm systematic translational error with the MR-compatible thermoplastic mask + coil-compatible workflow (Cuccia 2021).
Paediatric brain-tumour SRT
RT-002 paediatric-size full-face mask + O-frame + paediatric bite-block. Same physics as the adult SRS configuration but sized for paediatric anatomy; the low-temperature activation avoids the moulding-time burn risk that would otherwise limit paediatric use.
Trunk / thorax IGRT + IMRT
RT-003 body shell + indexed thorax baseplate + arm supports. The body-shell restrains trunk motion across the fraction series; pairs with the thermoplastic head mask (RT-001 or RT-002) for the H&N-and-nodal treatment plans that need dual immobilisation.
Customised 3-point re-irradiation immobilisation
RT-001 or RT-002 + custom cushion + SRS bite-block. MD Anderson published a 21-patient / 105-session H&N SRT re-irradiation cohort where this configuration corrected initial 2.7 ± 1.4 mm 3D setup vectors to 0.0 ± 0.3 mm per-axis residuals — 2.0 mm PTV margin achievable (Wang 2016 · JACMP).
Why Thermoplastic Immobilization Mask Family?
The perforated polymer softens in a 65 °C water bath — well below the patient burn threshold. The RTT moulds the softened sheet directly to the patient at simulation; the sheet cools and hardens into a patient-specific shell within minutes. No pre-scanning, no third-party cast fabrication, no simulator turn-around delay.
A 30-patient / 40-mask / 920-image daily-MVCT H&N cohort showed mean 6D translational setup errors of 0.32 mm (X), −1.09 mm (Y) and 2.24 mm (Z) — well inside the CTV-to-PTV 3-5 mm margin used in standard H&N IMRT. Rotational errors below 0.4° on every axis. That's what a modern thermoplastic-mask workflow delivers on the daily image-guided cadence.
A multi-centre European review anchors the MR-compatible thermoplastic mask + non-ferromagnetic fastener + coil-compatible-baseplate workflow at < 1 mm systematic translational setup error on MR-Linac + MR-sim. The same shell transfers from CT-sim to MR-sim to MR-Linac without per-room recalibration.
Variant matrix
Pick the SKU, the frame and the accessory kit
Three SKUs cover the whole external-beam anatomy — head-and-neck IMRT, cranial SRS and trunk IGRT. Frame compatibility spans S-frame, SRS-frame and indexed thorax baseplate. Accessory kit maps the mask to the treatment workflow (H&N routine, SRS re-irradiation, MR-Linac).
SKU variants
| SKU | Variant | Fit | Frame | Use / evidence |
|---|---|---|---|---|
| RT-001 | S-Frame head-and-neck mask | Head + shoulder | S-frame base plate | Routine H&N IMRT / VMAT; sub-2.24 mm mean 6D setup error under daily MVCT (You 2024) |
| RT-002 | Full-face cranial + SRS mask | Cranium + face | S-frame or SRS-frame compatible | Cranial IMRT + intracranial SRS / SRT; intrafractional 3D drift 0.21 mm at 0-2 min → 0.53 mm plateau at 10 min (Mangesius 2019) |
| RT-003 | Full-body thermoplastic shell | Trunk / thorax | Indexed thorax baseplate | Trunk / thorax IGRT + IMRT; pairs with indexed thorax baseplate for reproducible pelvic + abdominal setup |
Frame + baseplate compatibility
| S-Frame | RT-001 head-and-neck workhorse; standard couch-bar-pitch indexing; compatible with the majority of modern linac head-support baseplates |
| O-Frame / SRS-Frame | RT-002 stereotactic use; extends the S-frame concept with tighter head-shell fit for < 2 mm targeting SRS work under AAPM TG-42 |
| Indexed thorax baseplate | RT-003 body-shell interface; couch-bar-pitch indexing matches the thorax baseplate from the Patient Positioning Solutions family |
Accessories Matrix
| Mask-water bath (65 °C thermostat) | Low-temperature activation bath softens the thermoplastic sheet for moulding to the patient at simulation; thermostat holds the working range without operator supervision |
| Mould-room work surface + tools | Scissors, thermal gloves + reshaping tool for the moulding step; the mould-room fit is done at simulation and the mask ships to the treatment room with the patient plan |
| Shoulder-retraction strap | H&N-specific accessory paired with RT-001 — reproduces the shoulder-down position across fractions; reduces the neck-flexion setup uncertainty that would otherwise absorb margin |
| SRS bite-block (H&N + cranial) | Additional intra-oral fixation for stereotactic use (RT-002); the customised 3-point cushion + mask + bite-block combination has been shown to bring 3D residual setup errors to ~ 0.0 ± 0.3 mm per axis (Wang 2016 · MD Anderson) |
| MRI-compatible fastener set | Non-ferromagnetic hook / lock hardware for MR-linac + MR-sim workflows; the mask itself is polymer and MR-safe by default |
| Patient-comfort cushion | Between the mask and the skin — reduces pressure points across a 20-30 fraction series; does not compromise the shell fit or the setup reproducibility |
| Storage rack (per-patient labelled) | Between-fraction storage in the treatment-room ante-space; each patient's mask is labelled with treatment-plan ID + fraction schedule |
| Per-batch material + moulding certificate | ISO 13485-aligned material record — passive-accessory dossier that ships alongside the medical-device import paperwork under CDSCO Medical Devices Rules 2017 |
Per-batch material + moulding certificate ships with every consignment. MR-compatibility fastener set is specified at ordering. Family configuration + accessory kit selected against the receiving centre's treatment mix during site IQ / OQ / PQ.
Catalogs & Resources
AAPM + ICRU + CDSCO references that anchor thermoplastic-mask immobilisation in modern Indian radiotherapy. Contact Saxsons for family-configuration, MR-compatibility variant ordering, baseplate-pairing build sheet and IQ / OQ / PQ documentation.
AAPM TG-176 — Dosimetric effects of couch tops + immobilisation devices
AAPM Task Group 176 open-access report — the framework for attenuation, skin-dose build-up loss and shifted-dose-distribution effects of immobilisation devices in the treatment-planning system.
AAPM TG-42 — Stereotactic radiosurgery
AAPM Task Group 42 report — sets the < 2 mm overall targeting-error target for intracranial SRS that the RT-002 full-face + SRS-frame configuration is engineered against.
ICRU Report 91 — Prescribing, recording, and reporting stereotactic treatments with small photon beams
ICRU framework governing SRS / SRT stereotactic delivery — small-field dosimetry, GTV / CTV / PTV concepts and geometric-accuracy requirements the mask family plugs into.
CDSCO Medical Devices Rules 2017 (India)
Central Drugs Standard Control Organisation regulatory framework for medical-device import + registration in India. The route Class A passive-accessory immobilisation devices (masks, cushions, baseplates) go through — AERB does not licence non-radioactive positioning accessories.
Thermoplastic Mask Family
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.
FAQ
Thermoplastic immobilisation — questions we hear from Indian radiation-oncology teams
Why immobilisation is the setup-accuracy backbone for IMRT / SRS / SBRT, which mask fits which anatomy, MR-linac compatibility, and how the mask family is supplied across India.
Q.Why is patient immobilisation the pass/fail step for IMRT, SRS and SBRT?
Modern treatment margins are tight — 2 mm on IMRT plans, ≤ 1 mm on cranial SRS, 5 mm on typical SBRT. Any patient movement between simulation and treatment translates directly into a geometric miss, and any inter-fractional variation in patient shape moves the target out from under the plan. Immobilisation makes the patient sit in the same shape every fraction so the couch correction actually maps to the planned isocentre; without it, image guidance is correcting to a moving reference.
Q.How does thermoplastic mask immobilisation solve this in practice?
The perforated polymer sheet activates in a 65 °C water bath, moulds to the patient at simulation, and hardens as it cools into a rigid shell that keeps the patient in exactly that position every treatment. Published setup-accuracy studies report sub-2 mm 6D translational error under daily MVCT verification (You 2024) and 99.4 % of fractions aligned within 2 mm under CBCT guidance (Mail 2024) — the patient sits in the same shape on day 30 as on day 1.
Q.Which mask in the family fits which anatomy?
RT-001 S-Frame head-and-neck mask covers routine H&N IMRT — nasopharynx, oropharynx, thyroid, larynx. RT-002 full-face cranial mask locks head, forehead, chin and mandible for cranial IMRT and intracranial SRS / SRT where sub-millimetre reproducibility is required. RT-003 full-body thermoplastic shell covers trunk, thorax and abdomen for IGRT-guided treatments where thoracic and abdominal shape reproducibility drives the margin.
Q.Can the same mask be used on an MR-linac (Elekta Unity, ViewRay MRIdian)?
Yes. MR-compatible fastener sets replace the standard metallic clips with non-metallic hardware so the mask is safe inside the MR bore and does not produce susceptibility artefacts on the daily MR alignment. Cuccia 2021 (Radiotherapy and Oncology) reports sub-millimetre systematic setup error on MR-linac deliveries using thermoplastic mask immobilisation of this class.
Q.How is the mask family supplied and supported in India?
The thermoplastic mask family is distributed across India by Saxsons Group under SKUs RT-001, RT-002 and RT-003. Supply covers the perforated polymer sheets, indexed base-plate carriers, MR-compatible fastener kits and applications training for the mould-room technician on the 65 °C activation-and-mould workflow. The mask itself is a passive non-radioactive accessory imported under CDSCO Medical Devices Rules 2017 — no AERB licence needed for the device.
Thermoplastic Immobilization Mask Family supplier in India — Saxsons Group
Saxsons Group has supplied radiotherapy equipment to over 1,000 Indian hospitals since 1988. Every consignment of Thermoplastic Immobilization Mask Family 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
The thermoplastic mask family for the whole external-beam radiotherapy anatomy
Contact Saxsons Group for RT-001 / 002 / 003 family sizing, S-frame vs O-frame vs indexed-baseplate build sheet, MR-compatibility variant ordering, accessory-kit selection (shoulder-retraction strap · SRS bite-block · patient-comfort cushion) and IQ / OQ / PQ documentation.