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Related Experiment Videos

64 elements two-dimensional piezoelectric array for 3D imaging.

M Akhnak1, O Martinez, L G Ullate

  • 1Instituto de Acústica, CSIC, Madrid, Spain.

Ultrasonics
|August 6, 2002
PubMed
Summary
This summary is machine-generated.

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This study presents a novel 1.5 MHz 2D segmented annular array (SAA) for non-destructive testing (NDT). The developed SAA offers a balance between image resolution and channel count, crucial for advanced ultrasonic imaging applications.

Area of Science:

  • Materials Science
  • Acoustics
  • Engineering

Background:

  • Ultrasound technology is vital for non-invasive inspection in medical imaging and non-destructive testing (NDT).
  • Advancements in 3D imaging necessitate innovative 2D ultrasonic array designs that minimize electronic channels without compromising resolution.
  • 2D segmented annular arrays (SAAs) provide an effective solution, balancing resolution, image quality, and channel requirements.

Purpose of the Study:

  • To design, manufacture, and test a 1.5 MHz 2D segmented annular array (SAA) with 64 elements and a 20 mm diameter.
  • To explore the use of 1-3 piezoelectric composites for array transducers, optimizing electromechanical properties.
  • To validate the array's performance through electrical, acoustic, and field measurements against simulation models.

Main Methods:

Related Experiment Videos

  • A 1.5 MHz SAA was designed using a flexible circuit for electrode and track definition on a 1-3 piezoelectric composite.
  • The array incorporated a soft backing and one matching layer.
  • Electrical and acoustic testing, along with acoustical field measurements at various steering angles, were conducted and compared with KLM and impulse response models.

Main Results:

  • The manufactured SAA demonstrated good agreement between electrical/acoustic tests and KLM-based simulations.
  • Acoustical field measurements correlated well with simulations using an exact impulse response approach.
  • The study identified that the current array geometry, optimized for metals in NDT, produces significant side lobes, suggesting smaller elements for medical applications.

Conclusions:

  • The developed 1.5 MHz SAA using 1-3 piezoelectric composites is a viable solution for NDT applications.
  • The flexible circuit design facilitates array geometry definition.
  • Further optimization with smaller elements is recommended for medical imaging to mitigate side lobe effects.