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Related Experiment Videos

Phase aberration correction in two dimensions using a deformable array transducer

L L Ries1, S W Smith

  • 1Department of Biomedical Engineering, Duke University, Durham, NC 27708, USA.

Ultrasonic Imaging
|July 1, 1995
PubMed
Summary
This summary is machine-generated.

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A novel deformable transducer offers effective 2D phase correction in medical ultrasound imaging, overcoming limitations of traditional 2D arrays. This innovation promises improved image quality with fewer channels, enhancing diagnostic capabilities.

Area of Science:

  • Medical Imaging
  • Biomedical Engineering
  • Acoustics

Background:

  • Tissue inhomogeneities cause phase aberrations, degrading medical ultrasound image quality by disrupting beam focus.
  • Current phase correction methods use electronic phase delays, necessitating complex 2D arrays for 2D aberration correction.
  • 2D arrays present challenges due to numerous elements and reduced sensitivity.

Purpose of the Study:

  • To introduce a novel deformable transducer for 2D phase correction in medical ultrasound.
  • To compare the performance of the deformable transducer with conventional phase correction techniques.
  • To evaluate the feasibility of using a deformable array for real-time ultrasound scans and on-line phase correction.

Main Methods:

  • A deformable transducer, inspired by adaptive optics, utilizes fewer channels for 2D phase correction.

Related Experiment Videos

  • Azimuth phase correction is achieved via electronic phase delay, while elevation correction uses piezoelectric actuators to tilt elements.
  • A prototype 1x32 array with 8 actuators was constructed and tested for real-time scanning and simulated on-line correction.

    • Main Results:

    • Simulations indicate that a deformable 1xN or 2xN transducer can achieve image quality comparable to 4xN or larger 2D arrays.
    • The prototype demonstrated the capability for real-time phased array scans.
    • The system successfully simulated on-line phase correction by adjusting element tilt in the elevation direction.

    Conclusions:

    • A deformable transducer offers a more practical and sensitive solution for 2D phase correction in medical ultrasound.
    • This technique significantly improves image quality compared to conventional methods, approaching the performance of larger, more complex arrays.
    • The developed prototype validates the potential of deformable arrays for advanced, real-time ultrasound imaging applications.