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Related Concept Videos

Ultrasonography01:17

Ultrasonography

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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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Ultrasound I: Abdominal Ultrasonography01:20

Ultrasound I: Abdominal Ultrasonography

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Introduction:
Abdominal ultrasonography, commonly known as abdominal ultrasound, is a vital, non-invasive medical imaging technique widely used in healthcare.
Procedure:
This diagnostic tool allows the clinician to visually inspect internal structures within the abdomen, including vital organs such as the liver, gallbladder, pancreas, kidneys, and spleen.
The abdominal ultrasound process begins with applying a special gel to the patient's skin over the abdomen. This gel enhances the...
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Assessing Blood pressure using a doppler ultrasound01:19

Assessing Blood pressure using a doppler ultrasound

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To obtain accurate blood pressure measurements in clinical settings, especially when traditional methods are insufficient, healthcare professionals utilize the Doppler ultrasound technique. This method uses high-frequency sound waves to detect blood flow within the arteries, which is crucial for patients with conditions that complicate circulatory system assessment.
Pre-Procedural Guidelines for Doppler Ultrasound Blood Pressure Assessment:
Preparation of Equipment:
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Ultrasound II: Endoscopic Ultrasound and FibroScan01:25

Ultrasound II: Endoscopic Ultrasound and FibroScan

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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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Intensity and Pressure of Sound Waves01:05

Intensity and Pressure of Sound Waves

1.1K
The intensity of sound waves can be related to displacement and pressure amplitudes by using their wave expressions and the definition of intensity. The critical step to achieve this is to write the power delivered by the particles on the wave as the product of force and velocity and simplify the force per unit area as the pressure. The velocity of the medium's particles can be derived from the displacement.
Unlike the time average of a sinusoidal term, which is zero since it is positive...
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Sound as Pressure Waves01:17

Sound as Pressure Waves

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Sound waves, which are longitudinal waves, can be modeled as the displacement amplitude varying as a function of the spatial and temporal coordinates. As a column of the medium is displaced, its successive columns are also displaced. As the successive displacements differ relatively, a pressure difference with the surrounding pressure is created. The gauge pressure varies across the medium.
The pressure fluctuation depends on the difference in displacements between the successive points in the...
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Multiplexing Focused Ultrasound Stimulation with Fluorescence Microscopy
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Ultrasound Physics.

Hamid Shokoohi1, David Chu2, Nour Al Jalbout1

  • 1Department of Emergency Medicine, Harvard Medical School, 25 Shattuck Street, Boston, MA 02115, USA; Department of Emergency Medicine, Massachusetts General Hospital, 55 Fruit Street, Boston, MA 02114, USA; Harvard Medical School, 25 Shattuck Street, Boston, MA 02115, USA.

Emergency Medicine Clinics of North America
|September 26, 2024
PubMed
Summary
This summary is machine-generated.

This article explains fundamental ultrasound physics, including sound wave properties, tissue interactions, artifacts, and machine controls (knobology). Understanding these basics is crucial for effective point-of-care ultrasound (POCUS) use in clinical practice.

Keywords:
ArtifactsB-ModeDopplerImage resolutionKnobologyPOCUSPoint-of-care ultrasoundUltrasound physics

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A Novel Application of Musculoskeletal Ultrasound Imaging
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Area of Science:

  • Medical Imaging
  • Ultrasound Physics

Background:

  • Point-of-care ultrasound (POCUS) is increasingly utilized across diverse clinical environments.
  • A strong grasp of ultrasound fundamentals is essential for POCUS practitioners.

Purpose of the Study:

  • To elucidate core principles of ultrasound physics relevant to POCUS.
  • To connect theoretical concepts to practical clinical applications.

Main Methods:

  • Review and synthesis of fundamental ultrasound physics concepts.
  • Discussion of sound wave propagation and tissue interactions.
  • Explanation of common ultrasound artifacts and machine controls (knobology).

Main Results:

  • Detailed explanation of ultrasound wave properties.
  • Analysis of how ultrasound interacts with different biological tissues.
  • Identification and description of prevalent ultrasound artifacts.
  • Guidance on optimizing image acquisition using machine controls.

Conclusions:

  • A comprehensive understanding of ultrasound physics enhances POCUS performance.
  • Knowledge of physics, artifacts, and knobology directly impacts clinical diagnostic accuracy.
  • This foundational knowledge is vital for safe and effective POCUS utilization.