How the images are reconstructed in ct?

Computed axial tomography (CT or CAT) scans use x rays to produce high resolution images of soft and hard tissue. The patient (or object of interest) is put inside a cylindrical scanner and an x-ray beam is directed through the body and picked up by detectors. Because there are thousands images taken at many angles and positions, the process collects a great deal of data. There are image processing techniques that reassemble all this data into a detailed 3D reconstruction of the section of tissue scanned. This data can then be used to give "slices" of the tissue or create other types of images and perspectives with the full benefit of the 3D information. Thus, the essence of the success of this technique is the ability to create and process the immense about of data needed for the 3D reconstruction.