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Cylindrical geometry: a further step in active microwave tomography
Broquetas Ibars, Antoni; Jofre Roca, Lluís; Cardama Aznar, Ángel; Elias Fusté, Antonio; Rius Casals, Juan Manuel; Romeu Robert, Jordi
Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions; Universitat Politècnica de Catalunya. RSLAB - Grup de Recerca en Teledetecció
A prototype imaging system for active microwave tomography using cylindrical geometry has been developed, making it possible to obtain images of the dielectric properties of biological targets at 2.45 GHz. This configuration allows a fast exploration of body slices placed along the array axis, in a way similar to that of present X-ray scanners. The electromagnetic compatibility (EMC) of this approach is critical because the strongly attenuated received fields are measured on the same array which is being used to emit a high-level illuminating signal. Therefore, carefully designed high-frequency architectures and detection techniques are necessary. The system requires no mechanical movements to illuminate the body from multiple directions (views) and measure the scattered fields. In this way, a complete data set consisting of 64 views is acquired in 3 s using low-power illumination. The system is described, and images obtained with biological phantoms and actual bodies are presented.
Peer Reviewed
Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Teledetecció
Microwaves
Electromagnetic waves
Diagnosis
Radiation
Radioactivity
Biology
Image processing
Biomedical equipment
Computerised picture processing
c¡Computerised tomography
Electromagnetic compatibility
Medical diagnostic computing
Microwave imaging
2.45 GHz
EMC
UHF
Active microwave tomography
Array axis
Biological targets
Body slices
Cylindrical geometry
Detection techniques
Dielectric properties
Electromagnetic compatibility
High-frequency architectures
High-level illuminating signal
Low-power illumination
Prototype imaging system
Microones
Ones electromagnètiques
Radiació
Radioactivitat
Diagnòstic
Imatge -- Processament
Biologia
Article
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
         

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