Authorised Indian Distributor
Saxsons Group
New Delhi, India · Since 1997
Saxsons Fixed Laser Positioning SystemSemiconductor Red 635 nm — Two Cross + One Linear Lasers
Saxsons own-brand fixed laser positioning system for accelerator, cobalt unit, simulator and CT-sim iso-centre indication. Each set comprises two cross lasers and one linear laser. Semiconductor red 635 nm Class II light source — high brightness, small line width (< 1 mm at 3–5 m), no bending, no imaginary light, stable without drift. ISO-centre adjustment precision < 0.5 mm. Designed and manufactured in India by Saxsons Healthcare Pvt. Ltd.
Key Features
- Designed and manufactured in India by Saxsons Healthcare Pvt. Ltd. — Saxsons own-brand patient-alignment laser system
- Each set comprises two cross lasers and one linear laser converging at the iso-centre
- Semiconductor red 635 nm Class II laser source — high-brightness operation under typical clinical lighting
- Line width < 1 mm at 3–5 m projection distance — sharp, narrow line at the patient surface
- ISO-centre adjustment precision < 0.5 mm — tighter than the AAPM TG-142 default of 2 mm and the stereotactic-class 1 mm threshold
All Features
- Designed and manufactured in India by Saxsons Healthcare Pvt. Ltd. — Saxsons own-brand patient-alignment laser system
- Each set comprises two cross lasers and one linear laser converging at the iso-centre
- Semiconductor red 635 nm Class II laser source — high-brightness operation under typical clinical lighting
- Line width < 1 mm at 3–5 m projection distance — sharp, narrow line at the patient surface
- ISO-centre adjustment precision < 0.5 mm — tighter than the AAPM TG-142 default of 2 mm and the stereotactic-class 1 mm threshold
- High brightness, small line width, no bending — straight projection across the working volume
- No imaginary light — single, unambiguous primary line; no ghost reflections
- Stable without drift — semiconductor diode design eliminates the thermal drift of older laser tube designs
- Advanced and convenient adjustment system — fine laser-beam adjustment at arbitrary degrees of freedom, dependently
- Suitable for accelerator (linac), cobalt unit, simulator and CT-sim iso-centre indication
- Operates from standard mains power (220–240 V AC, 50 Hz) — typical Indian-clinic power profile
- CDSCO medical-device import registration supplied — the laser is a passive Class II red-laser accessory; no AERB licence is required for the device itself (the linac facility carries its own AERB licence separately)
- Commissioning service available — Saxsons installation team aligns the lasers against the linac iso-centre and provides the acceptance-test documentation
- Annual alignment-verification service available — laser-vs-iso-centre cross-check at the annual physicist QA cycle
Technical Specifications
| Manufacturer | Saxsons Healthcare Pvt. Ltd. (designed and manufactured in India) |
| Laser source | Semiconductor laser, 635 nm red, Class II |
| Configuration | Each set: 2 cross lasers + 1 linear laser |
| Line width | < 1 mm at 3–5 m projection distance |
| ISO-centre adjustment precision | < 0.5 mm |
| Optical characteristics | High brightness; small line width; no bending; no imaginary light; stable without drift |
| Adjustment system | Advanced fine laser-beam adjustment at arbitrary degrees of freedom (dependently) |
| Intended use | Iso-centre indication for accelerator (linac), cobalt unit, simulator and CT-sim |
| Power supply | 220–240 V AC, 50 Hz; typical Indian clinical mains |
| Compliance framework | AAPM TG-142 / TG-179 patient-positioning laser expectations; the laser QA record feeds the linac-facility QA dossier reviewed at the annual AERB linac-facility inspection |
| Regulatory status (India) | Passive Class II red-laser accessory; imported under CDSCO Medical Devices Rules 2017 — no AERB licence needed for the device itself |
| Services included | Saxsons installation + commissioning + acceptance-test paperwork; optional annual alignment-verification visit |
Applications
Iso-centre indication for accelerator · cobalt · simulator · CT-sim
Linac iso-centre indication
Two cross lasers and one linear laser converge at the linac iso-centre. The cross projection marks the lateral patient axes; the linear projection marks the sagittal midline. Daily QA reads each axis independently against the radiation iso-centre.
Cobalt unit iso-centre
Same laser configuration on cobalt teletherapy units. The < 0.5 mm adjustment precision is tighter than the typical cobalt-unit gantry positioning tolerance, so the lasers do not contribute to the dominant setup error.
CT-simulator marking room
Patient marking using the fixed cross / linear projection. The advanced adjustment system fine-tunes the projection without requiring full re-alignment of the head when small position corrections are needed.
Conventional simulator
Conventional X-ray simulator iso-centre indication for older planning workflows. The system serves both digital CT-sim and conventional simulator workflows from one installed laser set.
Stereotactic / SBRT setup
The < 0.5 mm adjustment precision meets stereotactic-class patient-positioning expectations. Higher-precision SRS / SBRT treatments run without a separate dedicated laser system.
Multi-room facility standardisation
A multi-vault radiotherapy department installs the same Saxsons fixed laser system in every treatment room. Consistent alignment standard across rooms — patient-position transfer between machines (machine-down day, multi-site treatment) stays coherent.
Why Saxsons Fixed Laser Positioning System?
< 0.5 mm ISO-centre adjustment precision is tighter than the AAPM TG-142 stereotactic-class 1 mm threshold by a factor of two. The room is engineered for stereotactic treatments by default — no separate alignment cycle when SRS / SBRT patients arrive on the linac.
Class II semiconductor red 635 nm laser source — eye-safe under the IEC 60825-1 Class II classification, high-brightness against typical clinical lighting, and stable without drift compared to older gas-laser tube designs. The line is bright enough to read in the brightly-lit CT-sim and treatment-vault rooms.
Two cross lasers project orthogonal cross-hairs on the patient sides; one linear laser projects the sagittal midline. Three independent alignment axes converge at the iso-centre. Daily QA reads each axis separately — drift in one axis without the others is the first signal of a specific-mount issue.
Catalogs & Resources
Saxsons own-brand product reference. Contact Saxsons for installation scheduling, commissioning, CDSCO medical-device import documentation and India service support.
Saxsons own-brand · Variant brochure
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Saxsons Fixed Laser Positioning
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FAQ
Fixed laser positioning system — questions we hear from Indian radiotherapy teams
Why every treatment room needs patient-alignment lasers, what < 0.5 mm precision buys against AAPM TG-142, why semiconductor Class II red is the contemporary default, and how the system is supplied across India.
Q.Why does every linac / cobalt / CT-sim room need a patient-alignment laser system?
The linac isocentre is a physical point in space defined by the intersection of the beam central axis and the couch rotation axis. The therapist cannot see it. Patient-alignment lasers project three orthogonal lines (two lateral cross-hairs + one sagittal midline) that meet at the isocentre, so the therapist can align the patient's tattooed marks to the same isocentre on every fraction. Without them, day-to-day setup drifts and the tumour walks out from under the plan.
Q.What problem does < 0.5 mm ISO-centre adjustment precision actually solve?
AAPM TG-142 sets the stereotactic-class laser-to-isocentre tolerance at 1 mm. Non-stereotactic default is 2 mm. The Saxsons fixed laser system delivers < 0.5 mm adjustment precision — tighter than the stereotactic threshold by a factor of two. Practically that means the room is engineered for stereotactic treatments by default; when an SRS or SBRT patient arrives on the linac, no separate alignment cycle is needed to drop the room into a stereotactic-class tolerance.
Q.Why semiconductor diode red 635 nm Class II lasers rather than older gas-tube designs?
Older gas-laser tubes drift with temperature and age — routine daily QA catches the drift, but the alignment cycle becomes frequent. Semiconductor 635 nm red Class II lasers are stable without drift and eye-safe under IEC 60825-1 Class II classification. The line is bright enough to read in the CT-sim and treatment-vault ambient lighting, and does not need a daily warm-up cycle before list start.
Q.Does the same system serve linac + cobalt + simulator + CT-sim rooms?
Yes. The fixed laser set (2 cross + 1 linear) is manufacturer-agnostic on the treatment platform — Varian TrueBeam / Halcyon / Ethos, Elekta Versa HD / Infinity, cobalt teletherapy units, conventional simulators and CT-simulators all use the same three-laser geometry. A multi-vault department standardises on one alignment reference across every room; patient position transfers between machines stay coherent.
Q.How is the fixed laser system supplied and supported in India?
Distributed across India by Saxsons Group. Supply covers the three-laser set, installation, commissioning against the room isocentre, acceptance-test documentation and optional annual alignment-verification service. Passive Class II red-laser accessory — no AERB licence required for the device itself; CDSCO medical-device import registration handled by Saxsons.
Saxsons Fixed Laser Positioning System supplier in India — Saxsons Group
Saxsons Group has supplied radiotherapy equipment to over 1,000 Indian hospitals since 1988. Every consignment of Saxsons Fixed Laser Positioning System 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
Saxsons own-brand patient-alignment lasers for your radiotherapy facility
Contact Saxsons Healthcare Pvt. Ltd. on +91 11 4077 6666 or saxsons@saxsons.com for fixed laser positioning system supply, installation, commissioning and annual alignment verification across India.