To assist surgeons and physicians in percutaneous needle based interventional procedures, a shape memory alloy (SMA)
actuated smart needle has been developed. A promising approach for surgeons and physicians to accurately reach target
locations in soft tissues is to use flexible active needles in surgical procedures such as brachytherapy and sample biopsy.
In the past decade, for an enhanced flexibility of needles, different methods have been proposed. These methods include
bevel-tip needles, kinked needles and flexure-based needles. After inserting these needles into soft materials, a curved path
was aimed to achieve instead of common straight path. The focus of this study is another control approach of achieving a
desired curved path. In this study, the needle body is attached with a SMA actuator close the needle tip that when actuated
bends the needle, and thereby leads to a curved path inside soft tissue. As an experiment, a prototype of the SMA actuated
needle has been developed and the behaviors of the needle have been evaluated in two different environments: air, and a
Bardia Konh and Mahdi Motalleb, "Evaluating the performance of an advanced smart needle prototype inside tissue," Proc. SPIE 10164, Active and Passive Smart Structures and Integrated Systems 2017, 101640G (Presented at SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring: March 27, 2017; Published: 11 April 2017); https://doi.org/10.1117/12.2260424.
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