Volume Reconstruction of Cone-Beam Geometry
نویسنده
چکیده
The purpose of this manuscript is to provide a tutorial overview on the subject of cone-beam geometry devices imaging. Toward this end, we have tried to strike a balance among purely algorithmic issues, topics (tomosynthesis imaging etc.) dealing with how to generate data for reconstruction in different domains, and artifacts inherent to different data collection strategies. This manuscript is structured to cover the basics of reconstruction from x-ray modern cone-beam geometry. Some results from simulations and real measurements are presented in order to give an explanation of the various pitfalls of the most used reconstruction techniques. However, the main focus of the paper is concerned with detailed derivations of reconstruction algorithms in modern cone-beam CT (CBCT) and digital tomosynthesis systems. A thorough analysis of artifacts and a discussion of practical issues, such as dose considerations, provide further insight into modern cone-beam geometry systems. We hope that the optimal volumetric reconstruction system which it can cone-beam geometry in high quality and a low radiation exposure dose in the near future.
منابع مشابه
An error-reduction-based algorithm for cone-beam computed tomography.
Image reconstruction from cone-beam projections collected along a single circular source trajectory is commonly done using the Feldkamp algorithm, which performs well only with a small cone angle. In this report, we propose an error-reduction-based algorithm to increase the cone angle by several folds to achieve satisfactory image quality at the same radiation dose. In our scheme, we first reco...
متن کاملArtifact reduction techniques in Cone Beam Computed Tomography (CBCT) imaging modality
Introduction: Cone beam computed tomography (CBCT) was introduced and became more common based on its low cost, fast image procedure rate and low radiation dose compared to CT. This imaging modality improved diagnostic and treatment-planning procedures by providing three-dimensional information with greatly reduced level of radiation dose compared to 2D dental imaging modalitie...
متن کاملA Cone-beam Reconstruction Algorithm for Dose-minimized Short Scan and Super Short Scan
Recently, we proposed an approach that deploys dynamic collimation to shield unnecessary redundant data in circular cone-beam data acquisition, enabling a dose-minimized short scan and super short scan. In this paper, we suggest a new reconstruction algorithm that produces images from these acquisitions that are superior to those restored by traditional short scan FDK-type algorithms. The metho...
متن کاملPractical Helical Cone Beam Algorithm for the Long Object Problem
Cone beam computed tomography (CT) based on nonplanar orbits has been an active area of research toward the goal of producing an exact volumetric reconstruction. To date, most reconstruction algorithms for non-planar orbits have been based on the theoretical framework of Tuy[1], Smith [2] and Grangeat[3]. Of all the investigated non-planar orbits, the helical scanning geometry is most promising...
متن کاملCone-Beam Image Reconstruction by Moving Frames
In this paper, we present a new algorithmic paradigm for cone-beam image reconstruction. The new class of algorithms, referred to as cone-beam reconstruction by moving frames, enables numerical implementation of exact cone-beam inversion using its intrinsic geometry. In particular, our algorithm allows a 3-D discrete approach to the differentiation-backprojection operator on the curved manifold...
متن کامل