TruNode | Faxitron Bioptics LLC


TruNode is a sterile, wireless, single-use gamma probe optimized for the most common radio-guided surgical procedures. The TruNode senses hotspots better than existing surgical gamma probes due to its innovative detector and heuristic audio feedback technology. It is simple to use, with finger-tip pushbutton switches. These switches give the surgeon complete control from the sterile field, including switching among high-sensitivity ‘scan’, high-resolution ‘point’ and I-125 'Seed' modes. Voice reporting and statistical algorithms take the guesswork out of count-rate determination. Our gamma probe's sterility also relieves nursing staff of infection controls. In addition the User Feedback Unit (which is mountable to an IV pole) provides both audible and visual user feedback. 

  • 10% Energy Resolution – Detect faint nodes closer to injection site; reduce background in parathyroid procedures

  • Three Detection Modes – Fingertip control allows for immediate selection of high-resolution ‘Point’, high-sensitivity ‘Scan’ or I-125 ‘Seed’ modes

  • Proprietary Audio Feedback – Reactive yet stable feedback elucidates hotspots more clearly

  • 10mm Gamma Probe Tip Diameter – Less invasive, easier to maneuver

  • Surgeon Controlled – Simple, fingertip control from the sterile field

  • Sterile – No draping, tactile grip

  • Voiced Reporting – Eliminates need to see display

  • Compact – User Feedback Unit clips to any IV pole – no footprint, no cords

  • Built-In Collimator – No separate components to misplace

  • Disposable – Ready to use, no batteries to replace or cables to find

  • Low Cost – Enables multiple gamma probes to be deployed in parallel, eliminating scheduling conflicts; own instead of rent

  • No CAPX – To budget, track, repair, or calibrate. No obsolescence

Straight Tip Gamma ProbeModel # TruNode ST10
Overall Dimensions17mm x 226mm
Operative Tip X reach10mm x 103mm
Gamma Probe Weight70g
Integrated Tungsten CollimatorYes
Selectable Modes

Point (Tc-99)*

Scan (Tc-99)*

Seed (I-125)

*Point mode filters out scatter more completely than Scan mode.

Energy Resolution 10% FWHM (Tc-99)
Shielding Efficiency>99.9% (Tc-99)

Spatial Resolution @ 1cm Air

13mm FWHM (Point Mode)

14mm FWHM (Scan Mode)

Sensitivity Max Air

18,000CPS / MBq (Point Mode)

27,000CPS / MBq (Scan Mode)

Sensitivity Max Air @ 1cm Air

3,400CPS / MBq (Point Mode)

4,800CPS / MBq (Scan Mode)

Angular Resolution Air46°  FWHM



Gamma Probe-Mounted Controls

Power-on & Connect Mode (Point, Scan, or Seed)

Count Rate Reporting

Count Rate Averaging

Audio Feedback Range

Volume (Includes Mute)

Gamma Probe Use Life100 mins continuous or 4 hrs intermittent (single use only)
Gamma Probe Shelf Life2 Years
User Feedback Unit (UFU)Model # TC10