In Memoriam Attila Kuba (1953-2006)

Reconstruction of binary matrices from fan-beam projections

The problem of the reconstruction of binary matrices from their fan-beam projections is investigated here. A fan-beam projection model is implemented and afterwards employed in systematic experiments to determine the optimal parameter values for a data acquisition and reconstruction algorithm. The fan-beam model, the reconstruction algorithm which uses the optimization method of Simulated Annea...

Parameter Settings for Reconstructing Binary Matrices from Fan-Beam Projections

Discrete tomography DT is used for reconstructing special objects consisting of a few types of known homogeneous materials. For example, if we know that the object is made of wood, then the space contains only two materials: wood and air. Such objects can be represented with two-valued functions. The knowledge of the discrete range of the function to be reconstructed can also reduce the number ...

Organ segmentation from 3D CT images

Publications: Method for automatically segmenting the spinal cord and canal from 3D CT images [6], Nyúl, László Gábor [7], Kanyó Judit [8], Máté Eörs [9], Makay Géza [10], Balogh Emese [11], Fidrich Márta [12], and Kuba Attila [13] , Computer Analysis of Images and Patterns, 2005, Berlin; Heidelberg, p.456 463, (2005) 3D segmentation of liver, kidneys and spleen from CT images [14], Bekes, Györ...

Discrete tomography in medical imaging

Binary Tomography with Deblurring

We study two scenarios of limited-angle binary tomography with data distorted with an unknown convolution: Either the projection data are taken from a blurred object, or the projection data themselves are blurred. These scenarios are relevant in case of scattering and due to a finite resolution of the detectors. Assuming that the unknown blurring process is adequately modeled by an isotropic Ga...