Research Of Optimize Reconstruction Method Of Cone Beam And Visualization

In the recent several years,X-ray reconstruction technology gradually goes to the security,industry and other fileds from the field of medicine.It plays an important role in many different fields.This article is mainly aimed at the security system.We can fast and accurately check people,goods and luggage of import and export using the advantage of X ray,such as low-cost,low-dose and non-contact.Now many security systems exists.But most can't meet the need of modern security systems.I hope i can supply new ideas to detect drugs and explosives in security systems by the study of X ray cone-beam reconstruction algorithm.I hope that can increase security of the citizens.The security systems of the past is mainly based on surface reconstruction.It can't meet the security systems'requirements of real-time,efficiency and accuracy by the limitation of shortcomings in surface reconstruction algorithm.However,three dimensional cone-beam reconstruction algorithm solve this problem.But three dimensional cone-beam reconstruction algorithm have large mount of data and complexity algorithm, imaging speed and quality has always been the focus of the study.X ray cone-beam reconstruction algorithm includes analytical reconstruction algorithms and algebraic reconstruction algorithms. Three dimensional cone-beam reconstruction algorithm is commonly used in analytical reconstruction algorithms.This article has done the deep study of the reconstruction algorithm.It is known that the time of three dimensional cone-beam reconstruction algorithm is mainly in the back projection process.So this article presents a lookuptable method and projected four images at the same time to increase the speed.These make speed more quickly.Because the choice of filter directly affects the quality of the reconstruction image,this article has improved the filter.As this, the quality of the reconstruction image has been greatly improved.At last,we use VTK algorithm to visualize slice series obtained three dimensional cone-beam reconstruction.We get satisfied visiual image after the settings of threshold values,transparency ,color values and so on.