ROLE OF FILTERING TECHNIQUES IN COMPUTED TOMOGRAPHY (CT) IMAGE RECONSTRUCTION

Suheel Zargar, Vaibhav Phad, Praveen Kumar Poola, Renu John

Abstract: With the arrival of Computed tomography (CT) as a diagnostic tool in the field of medical imaging, the field of X-ray imaging got revolutionized. The CT technology processes various images which are taken at different angles in order to produce the crosssectional images of the specific part of the object with the help of a Computer. Post processing of the combinational images is done by the computer in offline. The CT Technology uses back projection process for recreating the images of the scanned object. The reconstructed object with simple projection technique looks blurry and cannot convey the information exactly, hence for better clarity Filtered back projection is done. In this paper we will discuss the various filtering techniques for better reconstruction of object.

Keywords: Computed Tomography, Sinogram, Sheep Logan Phantom, image reconstruction, filtered back projection, and image enhancement.

DOI: https://doi.org/10.15623/ijret.2015.0424012