Title :
Phantom experimentation on infrared and optical tomography
Author :
Rapsomanikis, A.-N. ; Zioga, M. ; Kontos, M. ; Mikeli, M. ; Stiliaris, E.
Author_Institution :
Dept. of Phys., Nat. & Kapodistrian Univ. of Athens, Athens, Greece
fDate :
Oct. 27 2012-Nov. 3 2012
Abstract :
Accurate reconstruction of abnormalities inside biological tissues based on the detected temperature distribution presents a major challenge in emission thermography. The present study focuses on the relationship between the physical characteristics, such as the location and the emission power, of an embedded heat source inside an absorbing medium and the measured temperature distribution on the surface by means of infrared imaging. A phantom capable of emitting thermal radiation was constructed with temperature controlled resistance heaters and projections were obtained with an infrared-thermal camera system. The phantom was immersed in different density agar-composed absorbing media and its selected temperature scale was mammal´s core temperatures (350-400C). The planar information was further analyzed to reconstruct the tomographic images and from them the final 3D image of the phantom. The reconstruction procedure was performed with iterative algorithms (MLEM and accelerated ART). In order to investigate scattering and absorption effects, the same reconstruction procedure has been applied to optical (fluorescence) tomography with appropriately constructed phantoms. Reconstructions results are presented in this study for different phantom depth locations and heat generation rates.
Keywords :
biological tissues; biomedical optical imaging; biothermics; fluorescence; heat radiation; image reconstruction; infrared imaging; iterative methods; medical image processing; optical tomography; phantoms; temperature distribution; 3D image; MLEM; absorption effects; accelerated ART; biological tissues; density agar-composed absorbing media; emission power; emission thermography; fluorescence tomography; heat generation rates; heat source; infrared imaging; infrared tomography; infrared-thermal camera system; iterative algorithms; mammal core temperatures; optical tomography; phantom depth locations; physical characteristics; resistance heaters; temperature 35 degC to 40 degC; temperature distribution detection; temperature distribution measurement; thermal radiation; tomographic image reconstruction;
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC), 2012 IEEE
Conference_Location :
Anaheim, CA
Print_ISBN :
978-1-4673-2028-3
DOI :
10.1109/NSSMIC.2012.6551834