Class of backpropagation techniques for limited-angle reconstruction in microwave tomography

Filtered backpropagation (FBPP) is a well-known technique used in Diffraction Tomography (DT). For accurate reconstruction using FBPP, full 360° angular coverage is necessary. However, it has been shown that using some inherent redundancies in the projection data in a tomographic setup, accurate rec...

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Hauptverfasser:	Paladhi, P. Roy, Tayebi, A., Udpa, L., Udpa, S., Sinha, A.
Format:	Tagungsbericht
Sprache:	eng
Schlagworte:	CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS COMPUTERIZED SIMULATION DIFFRACTION ELECTROMAGNETIC FILTERS MICROWAVE RADIATION NOISE TOMOGRAPHY WAVE PROPAGATION
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creator	Paladhi, P. Roy Tayebi, A. Udpa, L. Udpa, S. Sinha, A.
description	Filtered backpropagation (FBPP) is a well-known technique used in Diffraction Tomography (DT). For accurate reconstruction using FBPP, full 360° angular coverage is necessary. However, it has been shown that using some inherent redundancies in the projection data in a tomographic setup, accurate reconstruction is still possible with 270° coverage which is called the minimal-scan angle range. This can be done by applying weighing functions (or filters) on projection data of the object to eliminate the redundancies and accurately reconstruct the image from 270° coverage. This paper demonstrates procedures to generate many general classes of these weighing filters. These are all equivalent at 270° coverage but vary in performance at lower angular coverages and in presence of noise. This paper does a comparative analysis of different filters when angular coverage is lower than minimal-scan angle of 270°. Simulation studies have been done to find optimum weight filters for sub-minimal angular coverage (
doi_str_mv	10.1063/1.4914648
format	Conference Proceeding
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subjects	CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS COMPUTERIZED SIMULATION DIFFRACTION ELECTROMAGNETIC FILTERS MICROWAVE RADIATION NOISE TOMOGRAPHY WAVE PROPAGATION
title	Class of backpropagation techniques for limited-angle reconstruction in microwave tomography
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