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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.
During an ultrasonography procedure, a handheld device called...
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Microbubble detection on ultrasound imaging by utilizing phase patterned waves.

Junseok An1, Naohiro Sugita2, Tadahiko Shinshi2

  • 1Department of Mechanical Engineering, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8501, Japan.

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Phase patterned waves (PPWs) significantly enhance microbubble (MB) detection in ultrasound imaging. This novel approach improves microvessel mapping by increasing detected MBs, reducing acquisition time and enhancing diagnostic capabilities.

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Area of Science:

  • Medical Imaging
  • Acoustics
  • Biomedical Engineering

Background:

  • Super-resolution ultrasonography is vital for visualizing microvasculature in disease diagnosis.
  • Microbubbles (MBs) are used as contrast agents for microvessel mapping, but their low detectability and diluted concentrations extend acquisition times.
  • Current methods face limitations in detecting all microbubbles, impacting the efficiency of microvessel mapping.

Purpose of the Study:

  • To enhance the detectability of microbubbles (MBs) in ultrasound imaging.
  • To reduce the acoustic data acquisition time required for microvessel mapping.
  • To improve the overall efficiency of bubble detection using ultrasound.

Main Methods:

  • Proposed utilizing phase patterned waves (PPWs) with spatially patterned phase distributions in the incident beam.
  • Investigated PPWs' effect on microbubble oscillation response and scattered wave generation.
  • Applied PPWs to ultrasound imaging simulations and experimental phantoms with fixed MBs.

Main Results:

  • Utilizing two types of PPWs alongside conventional ultrasound irradiation increased MB detection by up to 93.3%.
  • PPWs enhanced the oscillation response of MBs, leading to more significant scattered waves.
  • Demonstrated improved detection of MBs previously undetectable by conventional methods.

Conclusions:

  • Ultrasound imaging augmented with PPWs significantly increases the number of detected microbubbles.
  • This enhancement is expected to substantially improve the efficiency of microbubble detection and microvessel mapping.
  • PPWs offer a promising method to overcome limitations in current ultrasound-based microvasculature imaging.