Fiche publication
Date publication
février 2015
Journal
IEEE transactions on robotics : a publication of the IEEE Robotics and Automation Society
Auteurs
Membres identifiés du Cancéropôle Est :
Pr RENAUD Pierre
Tous les auteurs :
Ryu SC, Quek ZF, Koh JS, Renaud P, Black RJ, Moslehi B, Daniel BL, Cho KJ, Cutkosky MR
Lien Pubmed
Résumé
An active needle is proposed for the development of magnetic resonance imaging (MRI)-guided percutaneous procedures. The needle uses a low-transition-temperature shape memory alloy (LT SMA) wire actuator to produce bending in the distal section of the needle. Actuation is achieved with internal optical heating using laser light transported via optical fibers and side coupled to the LT SMA. A prototype, with a size equivalent to a standard 16-gauge biopsy needle, exhibits significant bending, with a tip deflection of more than 14° in air and 5° in hard tissue. A single-ended optical sensor with a gold-coated tip is developed to measure the curvature independently of temperature. The experimental results in tissue phantoms show that human tissue causes fast heat dissipation from the wire actuator; however, the active needle can compensate for typical targeting errors during prostate biopsy.
Référence
IEEE Trans Robot. 2015 Feb;31(1):1-11
