Many mobile robots nowadays use thermal imaging cameras (TICs) in order to enhance the environment model that is createdduring exploration tasks. In conventional thermography, thermal images always have to be careful...
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(纸本)9789897581984
Many mobile robots nowadays use thermal imaging cameras (TICs) in order to enhance the environment model that is createdduring exploration tasks. In conventional thermography, thermal images always have to be carefully revised by human operators, which is not practicable in autonomous applications. Unknown surface emissivities are the main source of misinterpretations in thermal images. In this work, we present two methods dealing with these misinterpretations by exploiting the TIC's changing point of view. While the first approach classifies the regarded material in order to estimate improved surface temperature values, the second one is capable of detecting and removing thermal reflections. The spatial relationship between the thermal images and the regarded surface is made by using a rigidly mounted sensor stack consisting of a TIC and a 3d laser range finder, whose extrinsic calibration is described. during evaluation, we demonstrate the functionality of both approaches.
Radiofrequency (RF) hyperthermia has been widely used for tumor ablation since magnetic-fluid-hyperthermia (MFH) can be utilized for increasing temperature in tumor-region as a complementary-method for hyperthermia. I...
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Radiofrequency (RF) hyperthermia has been widely used for tumor ablation since magnetic-fluid-hyperthermia (MFH) can be utilized for increasing temperature in tumor-region as a complementary-method for hyperthermia. In this study, the effectiveness of using the magnetite-nanoparticles (Fe3O4) in RF hyperthermia for breast cancer (BC) treatment by determining 3d-temperature-distribution using bioheat-transfer-mapping was evaluated. A breast-phantom with a tumor region was placed in an RF-device with 13.56 MHz frequency in different states (with and without-nanomagnetite). Parallelly, the calculations of the RF-wave and bioheat-equation were accomplished by numerical-simulation and finite-element-method (FEM) in COMSOL-software. The temperaturedifferences were experimentally measured at different points of the phantom with a precision of 0.1 degrees C, with temperature of 3.6 degrees C and 6.1 degrees C in without and with nanomagnetic conditions in tumor area, respectively, and also for normal area with temperature of 1.8 degrees C and 1.9 degrees C in non-presence and presence states of 0.05 gr magnetite for both conditions, respectively. Moreover, the difference between the simulation and the experimental results was 0.54-1.1 %. The conformity between temperature measurement in experimental and simulation studies in tumor and normal areas showed the effectiveness of the application of MNPs for RF hyperthermia in tissue equivalent breast phantom. Finally, the positive effect of 0.05 gr of MNPs on BC treatment was confirmed.
The combination of 3d scanners and infrared cameras has lead to the introduction of 3d thermography. Such analysis produces results in the form of three-dimensional thermograms, where the temperatures are mapped on a ...
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The combination of 3d scanners and infrared cameras has lead to the introduction of 3d thermography. Such analysis produces results in the form of three-dimensional thermograms, where the temperatures are mapped on a 3d model reconstruction of the inspected object. All work in the field of 3d thermography focused on its utility in passive thermography inspections. The authors propose a new real-time 3d temperature mapping method, which for the first time can be applied to active thermography analyses. All steps required to utilise 3d thermography are discussed, starting from acquisition of three-dimensional and infrareddata, going through image processing and scene reconstruction, finishing with thermal projection and ray-tracing visualisation techniques. The application of the developed method was testedduring diagnosis of several industrial composite structures-boats, planes and wind turbine blades.
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