Simulated CT scanner for educational purpose

Abstract

Computed Tomography is a technique to reconstruct an image of trans-Axial slab of the object from a series of x-ray radiographs taken at a prior-known angle. Sequences of x-ray radiographs are served as two-dimensional projection data for a 3D tomography. The most popular Feldkamp Algorithm which is based on Filtered Backprojection (FBP) approaches has shown to perform well for 3D reconstruction. Conventional x-ray computed tomography was implemented on a c-Arm x-ray apparatus where the x-ray tube and detector is capable of rotating to capture radiograph at any specific angle. In this paper, we designed the simulated computed tomography that can be used for educational purpose. A number of digital cameras are attached on the rotating gantry to capture a series of image around the object. This mimics a conebeam projection for computed tomography. In order to design the embedded system, Raspberry Pi is used as the main microcontroller which acts as data acquisition system. All projection data are sent to cloud server which is later download to PC for further processing.