By Topic

An active tissue-contrast sensing microsystem for biopsy needles: Initial results

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

2 Author(s)
Tao Li ; Eng. Res. Center for Wireless Integrated Microsyst., Univ. of Michigan, Ann Arbor, MI, USA ; Gianchandani, Y.B.

This paper describes progress toward an active tissue-contrast sensing microsystem that can be embedded at the tip of a fine biopsy needle. An analog CMOS chip is integrated with a piezoelectric sensor to reduce the impact of parasitic capacitances and allow differential sensing that will permit deep tissue sampling. The sensor element and the CMOS circuit are fabricated in-house and integrated onto the tip of a 20-gauge needle. The sensor module with integrated interface circuit has a size of 950 μm (L) × 350 μm (W) × 220 μm (H). It can successfully generate an oscillating signal as the readout of the integrated piezoelectric quartz sensor. Preliminary functional verification for sensing is provided by saline solutions of 0.5-3% concentration, representing a progressive increase of acoustic impedance. As expected the measured frequency shifts increase with higher saline concentration, indicating the validity of the sensor interface circuit design.

Published in:

Micro Electro Mechanical Systems (MEMS), 2011 IEEE 24th International Conference on

Date of Conference:

23-27 Jan. 2011