The detection of sentinel lymph nodes using Sentimag® is ultrasensitive – and as it is proximity-based, localising nodes is highly intuitive. The system is suitable for both pre- and post-incision use, and its sensitivity can be adjusted according to three levels from the front panel control. The Sentimag® instrument uses the principle of magnetic susceptometry and generates an alternating magnetic field which transiently magnetises the iron oxide particles in Magtrace®. The tiny magnetic signature generated by the Magtrace® particles is then detected by the Sentimag® probe.