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.
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.