After 2020, 2021 was a another really quiet year on this blog, this time with a grand total of five articles posted… And, of those five articles, four were part of the tutorial Reconstruction of a Real Dataset. Although I do have to say that that tutorial took…

Cherenkov radiation is best know for the eerie blue glow in the water around the core of nuclear reactors. It was named after the Russian scientist Pavel Cherenkov, who received the 1958 Nobel Prize in Physics for its discovery. It is…

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…

2020 was a really quiet year on this blog, with a grand total of four articles posted… I’ve been working full-time (and sometimes a bit more) in my consulting business, and the time to write blog posts often eluded me. Instead of going over the…

A Voronoi diagram is a partition of the plane into a number of cells, where each cell consists of exactly those points that are closest to the site (or seed point) of that cell. An example with ten seed points is shown in…

When you are designing a modem, you’ll typically make heavy use of simulations. Much of the design work is concentrated on the algorithmic part of the device, especially in these days of Software-Defined Radio (SDR), where the actual electronics might…

Now that we are just past Pi Approximation Day (22/7 or July 22), I thought about how to find other fractional approximations of pi with small numerators and denominators. I decided that I was going to brute force this thing, just because I can…