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Ultrasonography

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...

Ultrasound I: Abdominal Ultrasonography

Ultrasound I: Abdominal Ultrasonography

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...

Assessing Blood pressure using a doppler ultrasound

Assessing Blood pressure using a doppler ultrasound

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:

Ultrasound II: Endoscopic Ultrasound and FibroScan

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):

Intensity and Pressure of Sound Waves

Intensity and Pressure of Sound Waves

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...

Sound as Pressure Waves

Sound as Pressure Waves

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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Related Experiment Video

Updated: Dec 9, 2025

Author Spotlight: Integration of Fiber Photometry and Focused Ultrasound Neuromodulation for Investigating Neural Modulation in Freely Moving Mice

Author Spotlight: Integration of Fiber Photometry and Focused Ultrasound Neuromodulation for Investigating Neural Modulation in Freely Moving Mice

Published on: September 6, 2024

Ultrasound physics.

¹Department of Emergency Medicine, Scottsdale Emergency Associates, 7400 E Osborn Avenue, Scottsdale, AZ 85251, USA; The University of Arizona, Tucson, AZ 85721, USA.

Critical Care Clinics

|December 4, 2013

Summary

This summary is machine-generated.

Understanding ultrasound physics is crucial for accurate bedside imaging in acute care. This knowledge enhances image acquisition and interpretation for better patient diagnosis.

Keywords:

Doppler shift Frequency Instrumentation Period Transducer Ultrasound physics

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Area of Science:

Medical Imaging
Diagnostic Ultrasound Physics

Background:

Bedside ultrasound is vital for critical information in acute patient care.
Effective use requires understanding ultrasound physics for image performance and interpretation.

Purpose of the Study:

To explain the fundamental physics of diagnostic ultrasound.
To highlight the importance of instrumentation and image processing in sonography.

Main Methods:

Discussion of continuous wave and pulsed wave ultrasound physics.
Explanation of transducer technology and image processing principles.

Main Results:

The physics of sound waves (continuous and pulsed) are the basis of diagnostic ultrasound.
Instrumentation, including transducers and image processing, are key components for image acquisition.

Conclusions:

Understanding the interplay of ultrasound physics and instrumentation is essential for practitioners.
This knowledge empowers clinicians to achieve optimal sonographic image quality at the bedside.