Navigator 2.0 Gamma Probe
The Navigator 2.0 is a durable, lightweight wireless gamma probe for sentinel lymph node mapping, sentinel node biopsy and seed localisation. Stainless-steel probes with a built-in collimator mean no extra parts to lose, and the cordless control unit is ready the moment it is switched on. Supplied by ForthMed in Singapore and Malaysia.
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- Certified sterilisation options: STERIS, STERRAD, TSO3
- High sensitivity count detection
Certified sterilisation procedures for superior infection control.
Wireless and wired probes available.

Sterilisation & accessories



See the Navigator 2.0 in action
Watch Dilon Technologies’ overview of the Navigator 2.0 wireless gamma probe system.
Gamma Probe for Sentinel Node Biopsy
In sentinel node biopsy, a radiotracer such as Technetium-99m is injected near the tumour and drains to the first draining lymph node – the sentinel node. A handheld gamma probe detects that radioactivity, guiding the surgeon to the node through a small incision so it can be removed and examined by pathology.
Because the sentinel node is the first place cancer is likely to spread, a negative result allows many patients with early-stage, clinically node-negative breast cancer to avoid a full axillary node dissection – a more extensive operation with a higher risk of lymphoedema, numbness and reduced shoulder movement. Sentinel node mapping is also used in melanoma, gynaecological and head and neck cancers.
How the Navigator 2.0 supports sentinel node localisation
- High-sensitivity count detection to pinpoint the sentinel lymph node
- Built-in collimator on stainless-steel probes for directional accuracy
- Works with Tc-99m for lymphatic mapping and I-125 for seed localisation
- Wireless and wired probes, including 11mm probes for head and neck procedures
- No calibration needed – ready the moment it is switched on
Sentinel Node & Gamma Probe FAQs
What is a gamma probe used for in surgery?
A surgical gamma probe is a handheld radiation detector. During sentinel node biopsy it picks up the radiotracer (such as Tc-99m) that has drained to the sentinel lymph node, guiding the surgeon to that node through a small incision. It can also be used with I-125 seeds to localise non-palpable lesions.
What is a sentinel node?
The sentinel node is the first lymph node (or small group of nodes) that drains a tumour, and therefore the first place cancer cells are likely to spread. Removing and testing it shows whether the cancer has reached the lymph nodes.
What is the difference between sentinel node biopsy and axillary node dissection?
Sentinel node biopsy removes only the one to few nodes identified with the gamma probe. Axillary node dissection (axillary lymph node dissection, ALND) removes many lymph nodes from the armpit and carries a higher risk of lymphoedema, numbness and shoulder stiffness. When the sentinel nodes are clear, many early breast cancer patients can avoid axillary node dissection.
Is the Navigator 2.0 gamma probe available in Singapore and Malaysia?
Yes. ForthMed supplies the Dilon Navigator 2.0 surgical gamma probe, probes and accessories to hospitals in Singapore and Malaysia. Contact info@forthmed.com.sg for a demonstration or quotation.
Request a Navigator 2.0 demonstration
Our teams in Singapore and Kuala Lumpur can arrange a hands-on demonstration or quotation for the Navigator 2.0 gamma probe at your hospital.
