Image Reconstruction Algorithm using UT-ERT Dual Modality for Imaging Liquid and Gas

Abstract

Image reconstruction is one of significant element in the monitoring of a two-phase flow system. This paper presented image reconstruction algorithms for use in dual modality tomography (DMT) by combining ultrasonic tomography and electrical resistance tomography to visualise cross-sectional images of two-phase liquid/gas. The forward and inverse problems in image reconstruction are discussed, as well as various algorithms including linear back projection (LBP), filtered back projection (FBP), circular detection (CD), threshold (TH) and discrete wavelet transform (DWT) algorithms. Furthermore, the methods to assess the quality improvement of reconstructed image are also presented.