Metal artifacts : step 2

Firstly we will try to see what in the sinogram cause the metal artifacts. For this purpose, we will use a code to generate fake metal artifacts in a head phantom image. This code is the propery of Titipong Kaewlek and is available here.

Fig. 2 :  Original phantom image (left), With created artifacts (right)

We will know compare the two sinograms of these images. The sinograms are obtained from the Radon transform of the images. Each row in the sinogram correspond to a given angle in the imaging plane.

Fig .3 : Phantom with one artifact + sinogram (left), Original phantom + sinogram (right)

We know clearly see how the metal artifact appears in the sinogram. We know have to find a way to remove it.