Performance Improvements to 2-D Ultrasound Arrays
DESCRIPTION (Provided by Applicant): This proposed program uses advanced
patterning and alignment technology from the multiplayer ceramic packaging
industry to construct 2-D ultrasound arrays with multiplayer PZT posts to
increase capacitance and, therefore, transducer signal to noise ratio (SNR).
Conventional 2-D transducer arrays provide many advantages for medical
ultrasound imaging, but the performance often suffers from the low capacitance
elements and poor impedance matching. Use of cofired multiplayer technology to
produce individual array elements is a good solution to the impedance mismatch
problem because capacitance increases with the square of the number of layers
in an element. It was estimated that a 3-layer 2-D array will increase SNR by 9
dB and a 5 layer array will achieve close to 14 dB improvements. Making
electrical connections to fine scale, three dimensional ceramic structures was
not possible until recently. The progress made in the electronic ceramic
packaging industry in the past 5 years, with 75 and 25 1lm resolution for via
punching and precision alignment, respectively, has made this concept feasible.
For the Phase I effort, we will demonstrate the feasibility by constructing a
3.5 to 5 MHz 2-D array from multilayer PZT.
PROPOSED COMMERCIAL APPLICATION:
The most immediate application for 2-D arrays is cardiac volumetric imaging. Successful
multiplayer 2-D arrays would be drop-in replacement for current 2-D array technology.
Markets for real time volumetric scanning also exist in radiology and obstetrics where
slow 3-D ultrasound scanning is of limited value.
Small Business Information at Submission:
Principal Investigator:Wesley S. Hackenberger
TRS CERAMICS, INC.
2820 E COLLEGE AVE STATE COLLEGE, PA 16801
Number of Employees: