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Related Concept Videos

Ultrasonography01:17

Ultrasonography

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.
During an ultrasonography procedure, a handheld device called a...
Ultrasound II: Endoscopic Ultrasound and FibroScan01:25

Ultrasound II: Endoscopic Ultrasound and FibroScan

Endoscopic Ultrasound (EUS) and FibroScan are valuable diagnostic tools in gastroenterology and hepatology, each with specific applications and techniques.
Endoscopic Ultrasound (EUS):

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Real-time Monitoring of High Intensity Focused Ultrasound (HIFU) Ablation of In Vitro Canine Livers Using Harmonic Motion Imaging for Focused Ultrasound (HMIFU)
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[Research on high-frequency ultrasonic tissue harmonic information extraction based on phase inversion technique].

Yue-Jie Li1, Si-Yuan Tang, Li-Wei Wang

  • 1Institude of Biomedical Engineering, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin 300192.

Zhongguo Yi Liao Qi Xie Za Zhi = Chinese Journal of Medical Instrumentation
|March 4, 2009
PubMed
Summary

This study introduces a phase inversion technique for extracting high-frequency ultrasonic tissue harmonic information. The method effectively suppresses fundamental frequencies and enhances harmonic signals, outperforming traditional RF filter techniques.

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Area of Science:

  • Medical Imaging
  • Biomedical Engineering
  • Acoustics

Context:

  • High-frequency ultrasound is crucial for detailed tissue imaging.
  • Extracting harmonic information improves image quality and diagnostic accuracy.
  • Traditional methods for harmonic extraction have limitations.

Purpose:

  • To develop and evaluate a novel phase inversion technique for extracting ultrasonic tissue harmonic information.
  • To utilize wide-band ultrasonic transducers at frequencies of 20, 35, and 50 MHz.
  • To compare the effectiveness of this technique against traditional RF filter methods.

Summary:

  • A pulse-coded transmitting and wide-band receiving system was employed.
  • The phase inversion technique demonstrated superior fundamental frequency inhibition.
  • The method effectively increased the amplitude of second harmonic information.
  • Wide-band ultrasonic transducers were used at 20, 35, and 50 MHz.

Impact:

  • The proposed phase inversion technique offers improved performance over traditional RF filtering for harmonic imaging.
  • This advancement can lead to enhanced resolution and diagnostic capabilities in ultrasound imaging.
  • The technique shows potential for broader applications in medical diagnostics.