Related Experiment Video
Updated: May 22, 2026
16:31
Echo Particle Image Velocimetry
Published on: December 27, 2012
Ultrasound temperature estimation based on probability variation of backscatter data
Po-Hsiang Tsui1, Yu-Chen Shu, Wen-Shiang Chen
1Department of Medical Imaging and Radiological Sciences, Chang Gung University, Taiwan, Republic of China. tsuiph@mail.cgu.edu.tw
Medical Physics
|May 8, 2012
Summary
Ultrasound backscatter statistics change with temperature, enabling noninvasive temperature monitoring. This study shows variations in echo signals can accurately estimate tissue temperature during heating.
Area of Science:
- Biomedical Engineering
- Medical Imaging
- Acoustics
Background:
- Ultrasound imaging offers noninvasive temperature monitoring potential.
- Tissue heating alters acoustic parameters, affecting ultrasound backscattering randomness.
Purpose of the Study:
- Investigate temperature-dependent variations in ultrasound backscatter statistics.
- Assess feasibility of using backscatter statistics for ultrasound temperature estimation.
Main Methods:
- Experiments on phantoms and tissues using a temperature-controlled water tank and microwave ablation.
- Acquired raw ultrasound backscatter envelope images (37-45°C).
- Quantified backscatter statistics using the Ratio of Change in Nakagami parameter (RCN).
Main Results:
- RCN showed bidirectional changes with temperature.
- Absolute RCN (ARCN) increased monotonically with temperature.
- Tissue ARCN exhibited nonlinear dependency, potentially due to denaturation.
- ARCN(pa) images effectively visualized temperature distribution contours.
Conclusions:
- Temperature variations are reflected in ultrasound envelope statistics.
- Developed a novel ultrasound temperature imaging method.
- Enables simultaneous estimation of thermal dose and tissue properties.
Related Concept Videos
01:14Temperature 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...
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...
01:17Ultrasonography
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...
During an ultrasonography procedure, a handheld device called a...
01:19Assessing 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...
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...
01:05Absorption of Radiation
The rate of heat transfer by emitted radiation is described by the Stefan-Boltzmann law of radiation:
01:14Assessing 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...
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...
01:13Equipments Used to Measure Body Temperature
Body temperature can be assessed using various devices and measured in Celsius or Fahrenheit.
Glass-bulb Thermometer:
Glass-bulb thermometers are hollow glass tubes with a bulb tip containing liquid such as ethanol or mercury. Historically, glass bulb mercury thermometers were the standard device to measure body temperature. Today, mercury thermometers are prohibited in many countries due to the hazardous effects of mercury and the risk of exposure if the glass bulb breaks. In general,...
Glass-bulb Thermometer:
Glass-bulb thermometers are hollow glass tubes with a bulb tip containing liquid such as ethanol or mercury. Historically, glass bulb mercury thermometers were the standard device to measure body temperature. Today, mercury thermometers are prohibited in many countries due to the hazardous effects of mercury and the risk of exposure if the glass bulb breaks. In general,...