This is part four of a tutorial that describes how to create a reconstruction of a cone-beam computed tomography (CT) dataset. In this part, I’ll show how to create the actual reconstruction from the projections that were created in…
This is part three of a tutorial that describes how to create a reconstruction of a cone-beam computed tomography (CT) dataset. In this part, I’ll show how to convert the preprocessed images from part two into projections…
This is part two of a tutorial that describes how to create a reconstruction of a cone-beam computed tomography (CT) dataset. In this part, I’ll show how to preprocess the images to correct them for variations of the X-ray source intensity and…
This is part one of a tutorial that describes how to create a reconstruction of a cone-beam computed tomography (CT) dataset. This tutorial includes the preprocessing step that is needed to go from raw X-ray images to projections that…
This is part two of a tutorial that describes how to use the ASTRA Toolbox to create a 3D reconstruction from 2D projection images that were taken with a cone-beam CT scanner. In this second part, I’ll create a reconstruction from the synthetic dataset that…
This is part one of a tutorial that describes how to use the ASTRA Toolbox to create a 3D reconstruction from 2D projection images that were taken with a cone-beam CT scanner. In this first part, I’ll create a synthetic dataset…
As an illustration of some techniques from my series of articles on tomography, I have added a tool that demonstrates basic scanning and reconstruction. Go to the tool. There are several…
This is the second of a two-part article on the PDART algorithm. It explains most of the nitty-gritty details. The PDART algorithm needs two extra input parameters to do its magic, a threshold and a gray level. After each SIRT iteration, each pixel of…
This article is a bit of an experiment. In it, I’ll try to explain PDART, an example of current algorithm research in computed tomography (PDART was published in 2011). What the algorithm does is, in a nutshell, a SIRT reconstruction with intermediate…
As a practical example of an iterative reconstruction algorithm, as introduced in “Tomography, Part 4: Algebra!”, I present the SIRT (Simultaneous Iterative Reconstruction Technique) algorithm. As in the mentioned article, I start from the system of linear equations…