期刊
SIGNAL PROCESSING
卷 93, 期 10, 页码 2851-2863出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.sigpro.2012.06.002
关键词
Breast cancer; Mechanical apparatus; Protocol; Thermography; Inverse heat conduction problem
资金
- Mechanical Engineering Department
- Civil Engineering Department of UFPE
- Mastology Out-Patient Department of the Hospital das Clinicas of UFPE
- Brazilian research council CAPES
- Brazilian research council CNPq
The major goal of this paper is to help detect breast cancer early based on infrared images. Some procedures, protocols and numerical simulations were developed or performed. Two different issues are presented. The first is the development of a standardized protocol for the acquisition of breast thermal images including the design, construction and installation of mechanical apparatus. The second part is related to the greatest difficulty for the numerical computation of breast temperature profiles that is caused by the uncertainty of the real values of the thermophysical parameters of some tissues. Then, a methodology for estimating thermal properties based on these infrared images is presented. The commercial software FLUENT (TM) was used for the numerical simulation. A Sequential Quadratic Programming (SQP) method was used to solve the inverse problem and to estimate the thermal conductivity and blood perfusion of breast tissues. The results showed that it is possible to estimate the thermophysical properties using the thermography. The next stage will be to use the geometry of a real breast for the numerical simulation in conjunction with a linear mapping of the temperatures measured over the breast volume. (C) 2012 Elsevier B.V. All rights reserved.
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