Title :
Design of an experimental system for dual energy X-ray CT
Author :
Sukovic, Predrag ; Clinthorne, Neal H.
Author_Institution :
Michigan Univ., Ann Arbor, MI, USA
Abstract :
We present the design of a dual energy (DE) X-ray computed tomography (CT) test bench. It employs amorphous silicon (a-Si:H) imaging arrays and helical cone-beam geometry. Our goals are to evaluate: (1) the applicability of a-Si:H imaging arrays for tomography; (2) how our previously published dual energy penalized weighted least squares (DE PWLS) reconstruction method performs on experimentally acquired data; and (3) the optimal imaging geometry. This will allow us to design a setting that can be used clinically for attenuation correction for emission tomography, various quantitative computed tomography (QCT) applications, and removal of metal streak artifacts
Keywords :
biomedical equipment; computerised tomography; diagnostic radiography; emission tomography; image reconstruction; image sensors; least squares approximations; medical image processing; Gauss Seidel algorithm; a-Si:H imaging arrays; attenuation correction; computed tomography test bench design; dual energy X-ray CT; emission tomography; helical cone-beam geometry; metal streak artifacts removal; optimal imaging geometry; penalized weighted least squares reconstruction; Amorphous silicon; Attenuation; Computed tomography; Geometry; Least squares methods; Optical imaging; Performance evaluation; Reconstruction algorithms; System testing; X-ray imaging;
Conference_Titel :
Nuclear Science Symposium, 1999. Conference Record. 1999 IEEE
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-5696-9
DOI :
10.1109/NSSMIC.1999.845835
