Abstract
This study presents numerical and experimental investigation on breast cancer tumour parameters by inverse heat transfer method using genetic algorithm (GA) and image processing (IP) to determine the depth and rate of heat generation of a breast cancer tumour. To simulate the problem, using the energy equation in a cylinder including a heater, the surface temperature distribution was obtained. Then, the temperature surface of the cylinder was analysed by the GA in MATLAB software to determine the depth and rate of heat generation of heater. The validity of the numerical method was evaluated using the IP from a laboratory sample. A thermal heater was placed inside a cylinder and was covered by a tissue similar to the human body tissue. According to the obtained results, it was determined that the results of the laboratory sample and the numerical method were in agreement with each other. Finally, these steps were applied on the thermal image of a patient’s cancer breast to determine the depth and rate of heat generation of the breast tumour. It is shown that the average computational error between numerical and experimental results in this method to determine the depth of the tumour is about 8–10% and to determine the rate of tumour heat generation is about 0.01–1%.
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Abbreviations
- C :
-
specific heat capacity, J/kg K
- h :
-
average convection coefficient, W/m2K
- k :
-
thermal conductivity, W/m K
- \( \dot{Q}_{m} \) :
-
heat generation, W/m3
- r :
-
r-coordinate
- R :
-
radius of the tumour, m
- S :
-
sum of squares
- T :
-
temperature, °C
- t :
-
time, s
- Y :
-
calculated or measured temperature vector
- β :
-
unknown parameter vector
- ρ :
-
density
- ω :
-
blood perfusion term
- a :
-
arterial
- b :
-
blood
- m :
-
metabolic
- T:
-
transpose
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Appendix
Appendix
Specification for the FLIR E50 infrared camera.
Imaging performance | |
IR resolution | 240 × 180 pixels |
Spatial resolution | 1.82 mrad |
Thermal | < 0.05°C |
Sensitivity zoom | 1–4× continuous digital zoom, incl. panning |
Image presentation | |
Picture in picture | Scalable IR area on visual image |
Thermal fusion | Yes |
Image modes | IR image, visual image, thermal fusion, picture-in-picture, thumbnail gallery |
Measurement | |
Object temperature range | – 20 to +120°C/0 to +650°C |
Measurement analysis | |
Spot meter | 3 |
Area | 3 boxes with min./max./average |
Difference temperature | Delta temperature between measurement functions or reference temperature |
Reporting instant report | N/A |
Digital camera built-in digital camera | 3.1 Mpixels, and one LED light |
Image annotations | |
Voice | 60 s via Bluetooth® |
Text | Text from predefined list or soft keyboard on touch screen |
MeterLink | Bluetooth, Extech moisture meter MO297 or Extech clamp meter EX845 |
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BAHADOR, M., KESHTKAR, M.M. & ZARIEE, A. Numerical and experimental investigation on the breast cancer tumour parameters by inverse heat transfer method using genetic algorithm and image processing. Sādhanā 43, 142 (2018). https://doi.org/10.1007/s12046-018-0900-4
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DOI: https://doi.org/10.1007/s12046-018-0900-4