Author/Authors :
Gong, Changcheng Engineering Research Centre of Industrial Computed Tomography Nondestructive Testing of the Ministry of Education of China - Chongqing University - Chongqing , China , Zeng, Li Engineering Research Centre of Industrial Computed Tomography Nondestructive Testing of the Ministry of Education of China - Chongqing University - Chongqing , China , Ran , Lei Engineering Research Centre of Industrial Computed Tomography Nondestructive Testing of the Ministry of Education of China - Chongqing University - Chongqing , China , Wang, Chengxiang College of Mathematical Sciences - University of Electronic Science and Technology of China - Chengdu , China
Abstract :
Thepurposeofthispaperistodesignandsimulateanewcomputedtomography(CT)systemwithahightemporalresolutionfordynamicobjects.WeproposeamultisourcecubicalCT(MCCT)systemwithX-raytubesanddetectorsinstalledonacube.Carbonnanotube-(CNT-)basedX-rayfocalspotsaredistributedonthetwelveedgesofthecube.ThedistributionofX-rayfocalspotsanddetectorscompletelyavoidsmechanicalmovementstoscananobjectunderinspection.CNTsareexcellentelectronfieldemittersbecausetheuseofa“cold”cathodemakesitpossibletofabricateacathodewithmultipleelectronemissionpoints,andtheCNT-basedX-rayfocalspotspossesslittleresponsetimeandprogrammableemission.Theproposedrotation-freeMCCTsystemcanacquireahighscanningspeedwhenusingahighframeratedetector.Athree-dimensional(3D)reconstructionalgorithmwithtensorframelet-basedL0-norm(TF-L0)minimizationisdevelopedforthesimulationstudyoftheMCCT.SimulationexperimentresultsdemonstratethefeasibilityoftheMCCTsystem
Keywords :
Design and Simulation Study , CNT-Based Multisource Cubical CT System , Dynamic Objects , MCCT
