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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...
Imaging Studies II: Ultrasonography01:24

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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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Abdominal ultrasonography, commonly known as abdominal ultrasound, is a vital, non-invasive medical imaging technique widely used in healthcare.
Procedure:
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Ultrasound II: Endoscopic Ultrasound and FibroScan01:25

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Endoscopic Ultrasound (EUS) and FibroScan are valuable diagnostic tools in gastroenterology and hepatology, each with specific applications and techniques.
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Imaging Studies for Cardiovascular System I:Echocardiography01:17

Imaging Studies for Cardiovascular System I:Echocardiography

Cardiac imaging studies encompass a wide range of noninvasive and minimally invasive techniques designed to visualize the heart's structure and function in detail. One such technique is echocardiography, which uses high-frequency ultrasound waves to produce detailed images of the heart, known as echocardiograms.
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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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New sonographic techniques for harmonic imaging--underlying physical principles.

Christian Kollmann1

  • 1Center for Biomedical Engineering & Physics, Medical University of Vienna, Waehringer Guertel 18-20, A-1090 Vienna, Austria. christian.kollmann@meduniwien.ac.at

European Journal of Radiology
|September 19, 2007
PubMed
Summary

Modern harmonic imaging techniques, utilizing ultrasound contrast agents, offer enhanced clinical advantages over conventional methods. This review covers their principles, applications, emerging technologies, and safety considerations.

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Area of Science:

  • Medical Imaging
  • Ultrasound Technology
  • Biomedical Engineering

Background:

  • Conventional flow imaging methods have limitations in visualizing microvasculature.
  • Advancements in ultrasound technology have led to the development of harmonic imaging.
  • Ultrasound contrast agents significantly improve image quality and diagnostic capabilities.

Purpose of the Study:

  • To review modern harmonic imaging techniques and their underlying physical principles.
  • To highlight the clinical advantages of harmonic imaging compared to conventional methods.
  • To discuss emerging technologies and safety issues related to harmonic imaging with contrast agents.

Main Methods:

  • Review of scientific literature on harmonic imaging techniques.
  • Explanation of physical principles governing harmonic imaging.
  • Comparison of harmonic imaging with conventional flow imaging.

Main Results:

  • Harmonic imaging, especially with ultrasound contrast agents, provides superior visualization of blood flow.
  • Low/high mechanical index (MI) methods offer different diagnostic applications.
  • Emerging technologies promise further advancements in transducer and beamformer design.

Conclusions:

  • Modern harmonic imaging techniques represent a significant advancement in ultrasound diagnostics.
  • The use of ultrasound contrast agents is crucial for maximizing the benefits of harmonic imaging.
  • Continued research into new technologies and safety protocols is essential for the future of harmonic imaging.