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Sensors 2015, 15(2), 3107-3115; doi:10.3390/s150203107

Enhanced Visualization of Fine Needles Under Sonographic Guidance Using a MEMS Actuator

1
School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Ave., Singapore 639798, Singapore
2
Department of Gastroenterology, Tan Tock Seng Hospital, 11 Jalan Tan Tock Seng, Singapore 308433, Singapore
*
Author to whom correspondence should be addressed.
Received: 16 December 2014 / Accepted: 27 January 2015 / Published: 30 January 2015
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Abstract

Localization of a needle tip is important for biopsy examinations in clinics. However, the needle tip is sometimes difficult to discern under the guidance of sonography due to its poor visibility. A mini actuator that radiates a low-intensity ultrasound wave was manufactured using micro-electro-mechanical system (MEMS) technology. Interference between the radiated and diagnostic ultrasound pulses was observed as bright lines in the B-mode ultrasound image, from which the mini actuator could be recognized with ease. Because the distance between the mini actuator and the needle tip is fixed, the needle tip can be determined despite its inconsistent appearance in the sonography. Both gel phantom and ex vivo tissue evaluation showed that the needle tip can be determined reliably utilizing the acoustic interference pattern. View Full-Text
Keywords: biopsy; ultrasound imaging; acoustic interference; MEMS actuator biopsy; ultrasound imaging; acoustic interference; MEMS actuator
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Shen, Z.; Zhou, Y.; Miao, J.; Vu, K.F. Enhanced Visualization of Fine Needles Under Sonographic Guidance Using a MEMS Actuator. Sensors 2015, 15, 3107-3115.

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