Shape & Force Sensing Needle, 12FBGs

This prototype uses fiber Bragg grating (FBG) sensors and includes 3 locations to measure 3D curvature and compensate for temperature. The unique tip configuration has an additional set of sensors to detect 3D forces. The demonstration shows that as heat is applied, the needle still appears straight in the visualization based directly on the sensor measurements.

The optical interrogation speed can be set to more than 1kHz, and the visual update rate is 50fps. The needle is fully magnetic resonance imaging (MRI)-compatible, and is intended to be used in real-time interventional procedures under MR-guidance.

Biomimetics & Dexterous Manipulations Laboratory
Stanford University

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