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High-frequency ultrasound annular-array imaging. Part I: array design and fabrication.
Kevin A Snook1, Chang-Hong Hu, Thomas R Shrout
1Materials Research Institute, Pennsylvania State University, University Park, PA 16802, USA. ksnook@psu.edu
Summary
This study details the creation of a high-frequency annular array ultrasound system. The developed 50 MHz array uses specialized ceramic and laser micromachining for improved performance in ultrasonic imaging.
Area of Science:
- Ultrasound Technology
- Materials Science
Background:
- Development of advanced ultrasonic imaging systems is crucial for high-resolution medical diagnostics.
- High-frequency annular arrays offer potential for enhanced imaging capabilities.
Purpose of the Study:
- To design and fabricate a high-frequency annular array for ultrasonic imaging.
- To characterize the performance of the developed array.
Main Methods:
- A six-element, 50 MHz annular array was designed and fabricated.
- Submicron grain lead titanate piezoelectric ceramic was utilized.
- Laser micromachining was employed for element isolation.
- Electrical interconnections were made via direct soldering.
Main Results:
- The fabricated array achieved a 43 MHz center frequency and 30% relative bandwidth.
- An average insertion loss of 31 dB at 45 MHz was recorded.
- Maximum next-element crosstalk was measured at -27 dB in water.
Conclusions:
- The developed high-frequency annular array demonstrates promising performance characteristics.
- The design and fabrication methods are suitable for creating advanced ultrasonic imaging components.