Three-dimensional microwave tomography: experimental imaging of phantoms and biological objects

• Published in: IEEE transactions on microwave theory and techniques 2000-06, Vol.48 (6), p.1071-1074
• Main Authors: Semenov, S.Y., Bulyshev, A.E., Souvorov, A.E., Nazarov, A.G., Sizov, Y.E., Svenson, R.H., Posukh, V.G., Pavlovsky, A., Repin, P.N., Tatsis, G.P.
• Format: Article
• Language: English
• Subjects: Dielectrics; Frequency; Heart; Image reconstruction; Imaging phantoms; Microwave imaging; Microwaves; Newton method; Newton methods; Reconstruction; Three dimensional displays; Tomography; Two dimensional; Two dimensional displays
• ISSN: 0018-9480; 1557-9670
• DOI: 10.1109/22.904748

Microwave tomographic experiments have been performed on a three-dimensional (3-D) phantom and excised canine heart using a 3-D system operating at frequency of 2.4 GHz. A modified gradient reconstruction approach has been employed for the 3-D image reconstruction. To compare two-dimensional (2-D) and 3-D approaches, we also performed 2-D image reconstruction using an approach based on the Newton method. Experimental data acquired on experimental phantoms were analyzed using both 2-D and 3-D reconstruction approaches. High-quality images were reconstructed using the 3-D approach. The reconstruction procedure failed when the 2-D approach was applied to reconstruct images of the 3-D object. An image of the dielectric properties of the excised canine heart was obtained using a 3-D reconstruction approach. Images successfully revealed a complex internal structure of the heart, including both right-hand side and left-hand side ventricles.