Morphological operations and re-projection based novel low-dose CT reconstruction scheme

Computed Tomography (CT) has been a major contributor in revolutionizing and commercializing the medical imaging industry. However, it does so with some significant drawbacks. Most of the commonly used CT reconstruction algorithms need heavy dose of hazardous X-ray radiations. Higher X-ray dose produces better reconstructed image resolution, whereas low radiation dose projection data induces artifacts in the reconstructed image. It also reduces the image quality of conventional CT reconstruction algorithms [1]. The paper presents a novel algorithm for efficient CT reconstruction from low radiation dose projection data. In the proposed method, the phantom is subjected to low X-ray dose and then the projection data is enhanced using a series of post-processing algorithms and a new interpolation technique. The proposed algorithm is supported by computer simulation and promising results were observed. The proposed algorithm reduces the radiation dose to great extent, with good quality reconstructed image.