High intensity focused ultrasound (HIFU) is a new noninvasive method for treating certain tumors. Tissue mimicking phantoms are used to test HIFUs because it provides real time visualization of HIFU induced lesion evolution, and can calibrate the HIFU transducers. This study investigates the thermophsyical properties of egg white phantoms at room temperature, and varying concentrations of egg white. Measurements of thermal conductivity, diffusivity, and specific heat were taken using a ...
Lime-hemp concrete (LHC) is a sustainable construction material with a low environmental impact. In this study, the thermal properties of two lime-hemp mixes with varying levels of hemp were measured to analyze the material’s ability to be used on a larger scale in cold and wet climates. A TPS Thermal Constants Analyser measured the thermal properties of the lime-hemp samples using the Transient Plane Source (TPS) method. Results showed ...
Synthetic polymers in starch-based polymer formulations improve the thermal and mechanical properties of the compounds. The purpose of this study was to develop and analyze foams containing ethylene-vinyl acetate (EVA) and varying concentrations of corn starch. A Thermal Constants Analyser measured the thermal conductivity of the EVA/starch samples using the transient plane source (TPS) method. Results showed that the thermal conductivity of the blends increased with starch content. The ...
Intracavity transducers are probes used in early pregnancy scans. To ensure the transducers do not exceed the maximum temperature threshold when in close contact with embryonic and fetal tissues, a thermal test object (TTO) was designed to measure the temperature of the transducers when in contact with soft tissue. A tissue mimicking material (TMM) was fabricated in place of real human tissue and coupled with the transducer. A Thermal Constants ...
In this paper, the simplified hot-plate method (SHOP) measured the thermal conductivity of a prototype instrument, and artificial neural networks (ANNs) were employed to confirm the results. The goal of this paper was to produce ANNs to calibrate and improve the accuracy of SHOP thermal conductivity measurements. A thermal constants analyzer verified the results of the SHOP by measuring the thermal conductivity of plywood and calcium silicate boards using the ...
