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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

Imaging Studies II: Ultrasonography

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...
Temperature Measurement Sites01:14

Temperature Measurement Sites

A thermometer measures body temperature. The common sites for measuring body temperature are the oral cavity, axillary region, temporal artery, and skin surface, such as the forehead, abdomen, and axilla. True core body temperature is assessed in the rectum, tympanic membrane, pulmonary artery, esophagus, and urinary bladder.
Oral: When assessing oral temperature, the thermometer tip should be placed under the tongue in the posterior sublingual pocket. It offers accurate readings and can be...
Ultrasound II: Endoscopic Ultrasound and FibroScan01:25

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):
Assessing Body Temperature - Temporal Artery01:19

Assessing Body Temperature - Temporal Artery

Here is a stepwise guide to assessing the body temperature at the temporal artery using a temporal artery thermometer
Step 1: Perform hand hygiene and don a fresh pair of gloves to prevent cross-infection and ensure patient safety.
Step 2: Explain the procedure to the patient to establish trust. Clear communication establishes trust with the patient, ensures they understand what to expect, promotes cooperation, and enhances comfort during the procedure.  
Step 3: Assess the patient's forehead...
Assessing Body Temperature - Axilla01:14

Assessing Body Temperature - Axilla

Procedural Guide for Assessing Axillary Body Temperature using a Digital Thermometer:
Step 1: Perform hand hygiene and put on clean gloves to maintain infection control and prevent cross-contamination.
Step 2: Prepare the patient by explaining the procedure to ensure understanding and cooperation. Ensure privacy, expose the axilla, and inform the patient that minimal movement is crucial for an accurate reading.
Step 3: Adjust the patient’s clothing to expose only the axilla. It minimizes...

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Quantitative Visualization and Detection of Skin Cancer Using Dynamic Thermal Imaging
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Published on: May 5, 2011

Two-dimensional temperature estimation using diagnostic ultrasound.

C Simon1, P Vanbaren, E S Ebbini

  • 1Dept. of Electr. Eng. and Comput. Sci., Michigan Univ., Ann Arbor, MI.

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
|February 5, 2008
PubMed
Summary
This summary is machine-generated.

This study presents a novel ultrasound-based method for two-dimensional temperature estimation during thermal therapy. The technique accurately maps tissue temperature, aiding image-guided focused ultrasound therapy.

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Area of Science:

  • Medical Imaging
  • Biomedical Engineering
  • Acoustic Physics

Background:

  • Thermal therapy requires precise temperature monitoring for efficacy and safety.
  • Current methods for temperature estimation in thermal therapy can be invasive or lack spatial resolution.
  • Real-time, non-invasive temperature mapping is crucial for image-guided focused ultrasound (FUS) thermal therapy.

Purpose of the Study:

  • To develop and validate a two-dimensional temperature estimation method using ultrasound echo shifts.
  • To investigate the relationship between ultrasound echo shifts and tissue temperature rise.
  • To assess the accuracy and spatial resolution of the developed method for image guidance in FUS therapy.

Main Methods:

  • Developed a method based on detecting shifts in backscattered ultrasound echo location.
  • Derived a linear relationship between echo shifts and temperature rise from first principles and validated experimentally.
  • Estimated echo shifts using frame-to-frame correlation and applied differentiation for temperature mapping.
  • Investigated and mitigated the thermo-acoustic lens effect using filtering techniques.
  • Evaluated accuracy (0.5°C) and spatial resolution (2 mm) in tissue-mimicking phantoms using diagnostic and therapeutic ultrasound systems.

Main Results:

  • Demonstrated a linear relationship between ultrasound echo shifts and tissue temperature rise.
  • Achieved accurate two-dimensional temperature mapping with a spatial resolution of 2 mm and accuracy of 0.5°C.
  • Showcased the reduction of ripple artifacts caused by lateral temperature gradients through filtering.
  • Successfully overlaid estimated temperature maps onto grayscale ultrasound images.

Conclusions:

  • The developed ultrasound-based method provides accurate and non-invasive two-dimensional temperature estimation.
  • This technique is applicable for real-time image guidance of focused ultrasound thermal therapy.
  • The method offers a promising tool for enhancing the safety and efficacy of thermal ablation procedures.