Optics Express · 2012 · 71 citations · 16 references
EngineeringBioengineeringBiomedical EngineeringBiomedical ImagingDiagnostic ImagingDigital ImagingComputed TomographyComputed Tomography PhysicsImage ReconstructionImagingMedical ImagingThree-dimensional ReconstructionBeam PropagationComputed Tomography ReconstructionConvolutionGaussian Beam PropagationPhysical PropertiesReconstruction AlgorithmsTomographic ImagingTomographic Reconstruction
In this paper, a model of the beam propagation is developed according to the physical properties of THz waves used in THz computed tomography (CT) scan imaging. This model is first included in an acquisition simulator to observe and estimate the impact of the Gaussian beam intensity profile on the projection sets. Second, the model is introduced in several inversion methods as a convolution filter to perform efficient tomographic reconstructions of simulated and real acquired objects. Results obtained with three reconstruction methods (BFP, SART and OSEM) are compared to the techniques proposed in this paper. We will demonstrate an increase of the overall quality and accuracy of the 3D reconstructions.
16
Image quality assessment: from error visibility to structural similarity
Zhou Wang, Alan C. Bovik, Hamid R. Sheikh et al. · IEEE Transactions on Image Processing · 2004 · 56K citations