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Application of generalized pulse spectrum technique to the image reconstruction in optical computerized tomography

Gao, F; Niu, H; Zhang, H; Delpy, DT; (1998) Application of generalized pulse spectrum technique to the image reconstruction in optical computerized tomography. Guangzi Xuebao/Acta Photonica Sinica , 27 (8) pp. 679-688.

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Abstract

Indirect methods have long been known as one of the most potential tools to implement 3D near-infrared imaging for biomedical diagnosis. This approach is based on the assumption that, given a set of measurements of transmitted light between pairs of source and detection sites on the surface of an object , there exists a unique three - dimensional distribution of internal absorptive and scattering parameters which would yield that set . Mathematically , the image reconstruction therefore becomes a task of solving an inverse problem to an appropriate model of photon transport . In this paper , it is presented a generalized pulse spectrum technique (GPST) for solving the inverse problem of the image reconstruction in optical tomography, and its implementation to a diffusion-equation based inverse model . By properly selecting the working frequencies , the numerical expriments show that this algorithm has advantages over other existing methods of more accurate result and reasonable computational time . Finally , some principles in the choice of the working frequencies for the reconstruction are accessed.

Type: Article
Title: Application of generalized pulse spectrum technique to the image reconstruction in optical computerized tomography
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Med Phys and Biomedical Eng
URI: http://discovery.ucl.ac.uk/id/eprint/184980
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