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Related Concept Videos

Echo01:06

Echo

The human ear cannot distinguish between two sources of sound if they happen to reach within a specific time interval, typically 0.1 seconds apart. More than this, and they are perceived as separate sources.
Imagine the sound is reflected back to the ears. Assuming that the source is very close to the human, the difference between hearing the two sounds—the emitted sound and the reflected sound—may be more than the minimum time for perceiving distinct sounds. If this is the case, then the...
Imaging Studies for Cardiovascular System II:Types of Echocardiography01:20

Imaging Studies for Cardiovascular System II:Types of Echocardiography

Echocardiography plays a role in assessing cardiac health and detecting heart conditions, with various types providing critical insights for diagnosis and treatment.
Types of Echocardiography
Transthoracic Echocardiography (TTE)
TTE is the most common type of echocardiogram which involves placing a transducer on the patient's chest, emitting sound waves to create heart images. TTE is invaluable for evaluating the heart's size, structure, and motion, making it particularly useful for diagnosing...
Phase Contrast and Differential Interference Contrast Microscopy01:26

Phase Contrast and Differential Interference Contrast Microscopy

Phase-Contrast Microscopes
In-phase-contrast microscopes, interference between light directly passing through a cell and light refracted by cellular components is used to create high-contrast, high-resolution images without staining. It is the oldest and simplest type of microscope that creates an image by altering the wavelengths of light rays passing through the specimen. Altered wavelength paths are created using an annular stop in the condenser. The annular stop produces a hollow cone of...
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...
Double Resonance Techniques: Overview01:12

Double Resonance Techniques: Overview

Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or radiofrequency pulses to manipulate and observe two distinct nuclear spins. One important application of double resonance is spin decoupling, which selectively suppresses coupling with one type of nucleus while observing the NMR signal from another nucleus, simplifying the spectrum and enhancing resolution.
Spin decoupling is usually achieved by...
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.
Indications: Echocardiography is utilized to diagnose heart failure, valve disorders, and myocardial infarction. It also assesses cardiac structures' size, shape, and motion, evaluates...

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Related Experiment Video

Updated: Jun 26, 2026

The Measurement and Treatment of Suppression in Amblyopia
08:34

The Measurement and Treatment of Suppression in Amblyopia

Published on: December 14, 2012

How to misuse echo contrast.

Magnus Dencker1, Anna Missios

  • 1Dept of Clinical Physiology and Nuclear Medicine, University Hospital MAS, Lund University, Malmö, Sweden. magnus.dencker@skane.se

Cardiovascular Ultrasound
|January 31, 2009
PubMed
Summary

Transthoracic echocardiography misdiagnosed a left atrial mass due to contrast enhancement, which was later found to be a hiatal hernia. This case highlights the importance of transesophageal echocardiography for accurate cardiac imaging.

Area of Science:

  • Cardiology
  • Medical Imaging

Background:

  • Primary intracardiac tumors are rare and can be mimicked by other conditions.
  • Contrast echocardiography is used to differentiate cardiac masses.
  • Echocardiography is a key diagnostic tool in cardiology.

Observation:

  • An 80-year-old woman presented with dyspnea.
  • Transthoracic echocardiography showed a left atrial mass with contrast enhancement, suggesting a tumor.
  • Transesophageal echocardiography revealed a normal left atrium; gastroscopy identified a hiatal hernia.

Findings:

  • Transthoracic echocardiography (TTE) misdiagnosed a left atrial mass.
  • Contrast enhancement on TTE falsely indicated a tumor.
  • Transesophageal echocardiography (TEE) provided accurate cardiac structure visualization.

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Contrast-Enhanced Subharmonic Aided Pressure Estimation (SHAPE) Using Ultrasound Imaging with a Focus on Identifying Portal Hypertension
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Contrast-Enhanced Subharmonic Aided Pressure Estimation (SHAPE) Using Ultrasound Imaging with a Focus on Identifying Portal Hypertension

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Related Experiment Videos

Last Updated: Jun 26, 2026

The Measurement and Treatment of Suppression in Amblyopia
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The Measurement and Treatment of Suppression in Amblyopia

Published on: December 14, 2012

Troubleshooting FoCUS Image Acquisition: Patient Positioning, Transducer Manipulation, and Image Optimization
06:50

Troubleshooting FoCUS Image Acquisition: Patient Positioning, Transducer Manipulation, and Image Optimization

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Contrast-Enhanced Subharmonic Aided Pressure Estimation (SHAPE) Using Ultrasound Imaging with a Focus on Identifying Portal Hypertension
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Contrast-Enhanced Subharmonic Aided Pressure Estimation (SHAPE) Using Ultrasound Imaging with a Focus on Identifying Portal Hypertension

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Implications:

  • Liberal use of TEE is recommended for optimal cardiac structure assessment.
  • Careful interpretation of contrast echocardiography is crucial to avoid misdiagnosis.
  • Understanding imaging limitations is vital for accurate patient diagnosis and management.