Implementation of Generalized Back Projection Algorithm in 3-D EIT

Author

Wang, Hongbin ; Xu, Guizhi ; Zhang, Shuai ; Yin, Ning ; Yan, Weili

Author_Institution

Province-Minist. Joint Key Lab. of Electromagn. Field & Electr. Apparatus Reliability, Hebei Univ. of Technol., Tianjin, China

Volume

47

Issue

5

fYear

2011

fDate

5/1/2011 12:00:00 AM

Firstpage

1466

Lastpage

1469

Abstract

Electrical impedance tomography (EIT) is an imaging modality of determining imaging the interior conductivity distribution within an object. In the paper, generalized back projection algorithm (GBPA) is proposed for EIT image reconstruction. The algorithm is based on node back projection algorithm (NBPA), and extends projection range to arbitrary part of the object. To evaluate the proposed method, GBPA is first applied to image reconstruction using a simulated cylinder model. Compared with conventional back projection algorithm (BPA) and NBPA, the images reconstructed by GBPA are more accurate in terms of several metrics used in the paper. In addition, we present image reconstruction results using a 128-channel EIT system to demonstrate the performance of GBPA in real experiments.

Keywords

Maxwell equations; electric impedance imaging; image reconstruction; 3D EIT; EIT image reconstruction; electrical impedance tomography; generalized back projection algorithm; interior conductivity distribution; node back projection algorithm; Conductivity; Electric potential; Electrodes; Finite element methods; Image reconstruction; Projection algorithms; Tomography; Electrical impedance tomography; generalized back projection algorithm; image evaluation; image reconstruction; inverse problems;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2010.2085423

Filename

5754799