Related Experiment Video
Updated: May 29, 2026
09:02
Cortical Bone Assessment Using Ultrasonic Guided Waves: A Reproducibility Study in a Healthy Population
Published on: January 31, 2025
Reducing temperature influence on dry quantitative ultrasound bone assessment with constant temperature control
Yan-Yan Chen1, Yu-Bing Xu, Li-Kui Zhan
1Department of Automation, University of Science and Technology of China, Hefei 230027, Anhui, China.
Ultrasonics
|September 13, 2011
Summary
This study improved ultrasonic bone assessment precision by controlling temperature with a warm airflow system. Results show high reproducibility and strong correlation with DEXA, enhancing bone status evaluation.
Area of Science:
- Biomedical Engineering
- Medical Physics
- Orthopedics
Background:
- Ultrasonic bone assessment is a growing method for evaluating bone health.
- Temperature fluctuations can impact the accuracy of ultrasonic bone measurements.
- Improving precision is crucial for reliable bone status assessment.
Purpose of the Study:
- To enhance the precision of ultrasonic bone assessment.
- To minimize temperature-related influences in a dry, gel-coupled transducer system.
- To validate a novel temperature control method for bone ultrasound.
Main Methods:
- Developed a warm airflow generator to maintain a constant measurement temperature (35±1°C).
- Evaluated in-vivo performance with 30 participants.
- Assessed short-term precision using repeated measurements (10 times) within 20 minutes with repositioning.
- Calculated precision as root-mean-square average of coefficient of variation (CV(RMS)).
- Correlated results with dual-energy X-ray absorptiometry (DEXA).
Main Results:
- Achieved a CV(RMS) of 3.84% for broadband ultrasound attenuation.
- Achieved a CV(RMS) of 0.30% for speed of sound.
- Found significant Pearson correlations with DEXA: 0.808 for broadband ultrasound attenuation (p<0.001) and 0.586 for speed of sound (p<0.005).
Conclusions:
- The dry, gel-coupled transducer system with temperature control demonstrates high reproducibility.
- The system shows significant correlations with DEXA, validating its effectiveness.
- This method offers a promising approach for precise and reliable ultrasonic bone assessment.
Related Concept Videos
01:27Assessing Body Temperature - Rectal
Rectal temperature measurement is considered the most precise method for assessing core body temperature and typically registers higher than oral temperature. For adults, the rectal thermometer should be inserted 1 to 1.5 inches into the rectum to obtain the most accurate reading.
Follow these steps for rectal temperature assessment:
Step 1: Perform hand hygiene and don clean gloves to prevent cross-infection.
Step 2: Position the patient in a side-lying position to better visualize the rectal...
Follow these steps for rectal temperature assessment:
Step 1: Perform hand hygiene and don clean gloves to prevent cross-infection.
Step 2: Position the patient in a side-lying position to better visualize the rectal...
01:14Assessing Body Temperature - Oral
Here are the steps to accurately measure oral temperature using an electronic thermometer:
Step 1:
Start by practicing proper hand hygiene to prevent the spread of microorganisms.
Step 2:
Take the thermometer out of the charging unit, switch it on, and wait for the ready sign.
Step 3:
Gently slide the probe cover until a click is heard. This simple action prevents cross-contamination and ensures the correct placement of the probe cover.
Step 4:
Instruct the patient to open their mouth and place...
Step 1:
Start by practicing proper hand hygiene to prevent the spread of microorganisms.
Step 2:
Take the thermometer out of the charging unit, switch it on, and wait for the ready sign.
Step 3:
Gently slide the probe cover until a click is heard. This simple action prevents cross-contamination and ensures the correct placement of the probe cover.
Step 4:
Instruct the patient to open their mouth and place...
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...
01:14Assessing Body Temperature - Tympanic membrane
Assessing tympanic membrane temperature involves using a tympanic membrane thermometer (TMT). Here is a step-by-step guide:
Step 1: Begin by practicing good hand hygiene to prevent the transmission of microorganisms.
Step 2: Turn on the thermometer and wait until the ready sign appears on the screen to ensure accurate measurement.
Step 3: Slide the probe cover in place to prevent cross-contamination.
Step 4: Instruct the patient to tilt their head to the side for comfort and check for cerumen...
Step 1: Begin by practicing good hand hygiene to prevent the transmission of microorganisms.
Step 2: Turn on the thermometer and wait until the ready sign appears on the screen to ensure accurate measurement.
Step 3: Slide the probe cover in place to prevent cross-contamination.
Step 4: Instruct the patient to tilt their head to the side for comfort and check for cerumen...
01:29Decreased Body Temperature
A decreased body temperature can occur in patients with hypothermia and frostbite. Heat loss with extended cold exposure overpowers the body's ability to create heat, resulting in hypothermia. Core temperature readings help classify hypothermia. Mild hypothermia is temperatures between 32 °C (89.6 °F) and 35°C (95 °F) and is caused by impaired thermoregulation. Moderate hypothermia is temperatures between 28 C (82.4 °F) and 32 °C (89.6 °F) caused by sustained extreme cold exposure, and severe...
01:23Physical Methods for Controlling Microbial Growth: Temperature
Heat is a widely used method to control microbial growth by targeting and denaturing cellular proteins, thereby killing or inactivating microbes. This method's effectiveness is quantified using parameters such as the thermal death point (TDP), thermal death time (TDT), and decimal reduction time (D value). TDP represents the lowest temperature at which all microorganisms in a liquid suspension are eliminated within 10 minutes, whereas TDT is the time necessary to achieve sterilization at a...