Original scientific paper

Experimental verification of heat source parameter stimation from 3D thermograms

IVAN SOVIĆ ; Ruđer Bošković Institute, Center for informatics and computing, Bijenička 54, Zagreb, Croatia
TOMISLAV LIPIĆ ; Ruđer Bošković Institute, Center for informatics and computing, Bijenička 54, Zagreb, Croatia
LUKO GJENERO ; Ruđer Bošković Institute, Center for informatics and computing, Bijenička 54, Zagreb, Croatia
IVAN GRUBIŠIĆ ; Ruđer Bošković Institute, Center for informatics and computing, Bijenička 54, Zagreb, Croatia
KAROLJ SKALA ; Ruđer Bošković Institute, Center for informatics and computing, Bijenička 54, Zagreb, Croatia

Abstract

Major amount of thermal radiation emitted by objects is located in a
small part of the infrared spectrum of electromagnetic radiation, called the thermal infrared spectrum, and can be observed and measured using thermal infrared measurement cameras. Measuring heat transfer by radiation has proven to be very valuable inmedicine. One such medical application is the early detection and monitoring of breast cancers. Since tumors cause the rise in local tissue temperature, they can be observed as small embedded heat
sources. The focus of this paper is the construction of new artificial test sets for heat source parameter estimation (such as the source depth, volume and intensity/size), to be used before clinical trials. Amixture of ballistic gelatin was used as a heat conductance medium, while a resistor grid (consisting of nine resistors) was used as a heat source, embedded inside the gelatin. Simulation procedure was conducted, resulting in a rank list of parameter configurations
for every heat source of the grid. The expected values of parameters
were found to be high on the configuration list,with about the first 20% of configurations present in the search space. This paper shows a convenient and effective way of testing parameter estimation methods. On the other hand, although ballistic gelatin presents a homogeneous mixture for heat transfer, with similar density and elastic properties as the living tissue, it does not necessarily have the same thermal conductance. Therfore the possibilities
for future development of new materials for comparing parameter
estimation methods on artificial test sets should be considered, as well as development ofmore complex materials consisting ofmultiple layers and thus more accurately emulating the heat dispersion in human bodies.

Keywords

Hrčak ID:

76946

URI

https://hrcak.srce.hr/76946

Publication date:

15.11.2011.

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