DocumentCode :
129454
Title :
Performance optimization of ultrasonic needle actuating device for insertion operation into tissue mimics
Author :
Xiaochun Liao ; Sadiq, Muhammad ; Yang Kuang ; Corner, George ; Cochran, Sandy ; Zhihong Huang
Author_Institution :
Sch. of Eng., Phys. & Math., Univ. of Dundee, Dundee, UK
fYear :
2014
fDate :
3-6 Sept. 2014
Firstpage :
823
Lastpage :
826
Abstract :
Needle insertion with ultrasound actuation has been proven as an effective way to reduce the penetration force and needle deflection within soft tissue, facilitating operational manoeuverability and targeting accuracy in cancer biopsy and regional anaesthesia. In such percutaneous procedures, loading conditions from adjacent soft tissue alter the needle transducer´s impedance and cause deterioration of its vibration performance. In this paper, we report the needle transducer´s structure and working principle; we investigate the loading effects from tissue mimics on the transducer´s resonant impedance and vibration performance; and we show how to enhance the needle transducer´s vibration performance through optimization of geometrical dimensions and the electrical driving method. Structural optimization was carried out with different transversal dimensions of the needle. Electrical driving optimization was done by tracking the working resonant frequency and stabilizing the driving signal during operation. Experimental trials confirmed a force reduction of 70.2% with the structural optimization and 73.7% with the electrical driving optimization for the insertion operation into gelatin phantom, compared with a static needle.
Keywords :
acoustic impedance; acoustic resonance; acoustic signal processing; biological tissues; biomedical transducers; biomedical ultrasonics; biomimetics; needles; ultrasonic transducers; cancer biopsy; driving signal; electrical driving method; electrical driving optimization; gelatin phantom; geometrical dimensions; insertion operation; needle deflection; needle insertion; needle transducer structure; needle transducer vibration performance; penetration force; performance optimization; regional anaesthesia; resonant frequency; soft tissue; structural optimization; tissue mimics; transducer resonant impedance; transversal dimensions; ultrasonic needle actuating device; Acoustics; Force; Needles; Optimization; Resonant frequency; Transducers; Vibrations; medical ultrasonic needle transducer; needle intervention; numerical analysis; performance optimization;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Ultrasonics Symposium (IUS), 2014 IEEE International
Conference_Location :
Chicago, IL
Type :
conf
DOI :
10.1109/ULTSYM.2014.0202
Filename :
6931967
Link To Document :
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