Unwanted Temperature Rise at Muscle-Bone Interface During Ultrasound Hyperthermia.

Theoretical study of convergent ultrasound hyperthermia for treating bone tumors.

This study investigates the optimal external parameters for using an ultrasound applicator for treating bone tumors. This system utilized spherically arranged applicators such as scanned focused ultrasound, and spherically focused multielement applicators. The power deposition pattern is modeled as geometric gain with exponential attenuation. The specific absorption rate ratio (SARR) criteria h...

Effects of Microwave Hyperthermia at Two Different Frequencies (434 and 2450 MHz) on Human Muscle Temperature.

Temperature rise of alveolar bone during dental implant drilling using the finite element simulation

In this study, a three-dimensional elastic-plastic dynamic finite element model is used to simulate the alveolar bone temperature rise during dental implant drilling. An experimental setup was designed to verify the feasibility of the proposed dynamic finite element model. The peak bone temperature within the alveolar bone is investigated through both simulations and experiments. The results in...

Effect of coupling medium temperature on rate of intramuscular temperature rise using continuous ultrasound.

OBJECTIVE We determined the effects of coupling medium temperature on the rate of intramuscular temperature rise (RTR) during continuous ultrasound. DESIGN AND SETTING Ultrasound was applied in a continuous mode at a frequency of 1 MHz and intensity of 1.5 W/cm(2). Each subject received 3 treatments, using water-based coupling gel at temperatures of 18 degrees C, 25 degrees C, and 39 degrees ...

Transient Temperature Distribution inside Human Brain during Interstitial Microwave Hyperthermia

This study demonstrates computer simulation of human brain treated with interstitial microwave hyperthermia. A thin coaxial-slot antenna emitting microwaves is the heat source. For simplification, a 2D axisymmetric model is considered. The wave equation for TM wave case and the Pennes bioheat transfer equation for transient-state have been solved with the finite element method. The impact of th...