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Related Concept Videos

Imaging Studies II: Ultrasonography01:24

Imaging Studies II: Ultrasonography

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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...
236

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Related Experiment Video

Updated: Dec 22, 2025

Universal Hand-held Three-dimensional Optoacoustic Imaging Probe for Deep Tissue Human Angiography and Functional Preclinical Studies in Real Time
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Applied current thermoacoustic imaging for biological tissues.

Yanju Yang1,2, Zhengwu Xia3, Hui Xia3

  • 1Engineering Research Center of New Energy Storage Devices and Applications, Chongqing, 402160, China.

Technology and Health Care : Official Journal of the European Society for Engineering and Medicine
|May 5, 2020
PubMed
Summary

Applied Current Thermoacoustic Imaging (ACTAI) uses electrical characteristics to detect tissue changes for early cancer diagnosis. This noncontact method shows promise for clinical applications due to its deep penetration and clear imagery.

Keywords:
Thermoacoustic imaginglow conductivity phantomspulse current injection

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Area of Science:

  • Biomedical Engineering
  • Medical Imaging
  • Electrical Impedance Tomography

Background:

  • Electrical characteristics of biological tissues correlate with physiological and pathological states.
  • These changes offer potential for early cancer diagnosis and treatment.

Purpose of the Study:

  • To describe and validate Applied Current Thermoacoustic Imaging (ACTAI).
  • To explore ACTAI's theoretical basis and practical application through simulations and experiments.

Main Methods:

  • Studied the principle of ACTAI, involving pulsed current application to induce thermoacoustic waves.
  • Utilized time inversion methods to reconstruct conductivity information from received waves.
  • Performed numerical simulations on a low-conductivity model and experimental studies on fresh pork.

Main Results:

  • ACTAI successfully identified conductivity changes in targets.
  • Achieved excellent imagery contrast and deep penetration capabilities.
  • Demonstrated the potential for noncontact measurement of tissue conductivity.

Conclusions:

  • ACTAI provides valuable conductivity information for biological tissues.
  • The noncontact nature and effectiveness of ACTAI suggest clinical utility.