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Related Concept Videos

Ultrasonography01:17

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Ultrasonography is an imaging technique that uses high-frequency sound waves to visualize the body's internal structures. It is a non-invasive and safe procedure that does not involve the use of ionizing radiation, making it widely used in various medical fields. Ultrasonography is used to study heart function, blood flow in the neck or extremities, certain conditions such as gallbladder disease, and fetal growth and development.
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IntroductionUltrasonography, or renal ultrasound, is a noninvasive medical imaging technique that uses high-frequency sound waves to visualize the kidneys, ureters, bladder, and surrounding tissues.Indications for Urinary System UltrasonographyUrinary system ultrasonography is indicated in various clinical scenarios, such as:Kidney Stones (Urolithiasis): To detect and monitor the size and presence of kidney or urinary tract stones.Hydronephrosis: To assess the dilation of the renal pelvis and...
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Diffuse field full matrix capture for near surface ultrasonic imaging.

J N Potter1, P D Wilcox1, A J Croxford1

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A new ultrasonic array imaging technique reconstructs near-surface material data, overcoming early saturation effects. This method enables clearer imaging of both near-surface and bulk materials using a single experiment.

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Area of Science:

  • Materials Science
  • Non-Destructive Testing
  • Ultrasonic Imaging

Background:

  • Near-surface imaging is often hindered by early time saturation effects in ultrasonic array data.
  • Directly acquired ultrasonic responses can exhibit nonlinearities that obscure critical material information.

Purpose of the Study:

  • To develop a novel technique for enhanced near-surface ultrasonic array imaging.
  • To overcome limitations of conventional methods in retrieving information from near-surface materials.

Main Methods:

  • Cross-correlation of a later time diffuse full matrix to reconstruct an undelayed full matrix.
  • Reconstruction process avoids nonlinear effects associated with early time saturation.
  • Formation of a hybrid full matrix using a temporally weighted sum of coherent and reconstructed matrices.

Main Results:

  • Successfully retrieved near-surface material information previously obscured by saturation effects.
  • Demonstrated effective near-surface and bulk material imaging from a single experimental setup.
  • The reconstructed full matrix provides data equivalent to an undelayed full matrix.

Conclusions:

  • The proposed cross-correlation technique significantly improves near-surface ultrasonic imaging.
  • Hybrid matrix approach enables comprehensive material characterization (near-surface and bulk) in one go.
  • This advancement offers a more effective non-destructive evaluation method for materials.