Fast radon transform

1. What is Radon transform in CT scan?
2. How does the radon transform work?
3. What is inverse Radon transform?

What is Radon transform in CT scan?

The Radon transform is an integral transform whose inverse is used to reconstruct images from medical CT scans. A technique for using Radon transforms to reconstruct a map of a planet's polar regions using a spacecraft in a polar orbit has also been devised (Roulston and Muhleman 1997).

How does the radon transform work?

The radon function computes projections of an image matrix along specified directions. A projection of a two-dimensional function f(x,y) is a set of line integrals. The radon function computes the line integrals from multiple sources along parallel paths, or beams, in a certain direction.

What is inverse Radon transform?

Inverse Radon Transform Definition. The iradon function inverts the Radon transform and can therefore be used to reconstruct images. As described in Radon Transform, given an image I and a set of angles theta , the radon function can be used to calculate the Radon transform. R = radon(I,theta);