Computed tomography system using a new MPGD for small animal imaging with energy resolving capability

Author

Carramate, L.F.N.D. ; Oliveira, C.A.B. ; Silva, A.L.M. ; Azevedo, C.D.R. ; Correia, P.M.M. ; da Silva, Arlindo M. ; Veloso, J.F.C.A.

Author_Institution

Phys. Dept., Univ. of Aveiro, Aveiro, Portugal

fYear

2012

fDate

Oct. 27 2012-Nov. 3 2012

Firstpage

3664

Lastpage

3666

Abstract

Micropatterned Gaseous Detectors (MPGDs) have been used for several years in single photon counting and energy resolved imaging systems. This kind of detectors presents suitable characteristics for such purposes as: elimination of the electronic noise, good energy resolution and high counting rate capability, absence of dead areas and 2D intrinsic position discrimination capability. A Computed Tomography (CT) system using a Thick COBRA (THCOBRA) with energy resolution capability envisaging small animal imaging is being developed. By using this kind of single photon counting and energy resolved detector it is possible to retain the interaction position information and energy of each detected single photon, allowing the application of Energy Weighting Technique (EWT) and, therefore, improvement of image quality. Cross-sectional images of a Poly(methyl methacrylate) - PMMA - phantom and of a sea snail are presented.

Keywords

biomedical equipment; computerised tomography; image reconstruction; medical image processing; phantoms; photon counting; polymers; 2D intrinsic position discrimination capability; MPGD; computed tomography system; cross-sectional imaging; electronic noise; energy resolution capability; energy resolving capability; energy weighting technique; high counting rate capability; image quality; interaction position information; micropatterned gaseous detectors; poly(methyl methacrylate)-PMMA-phantom; sea snail; single photon counting-energy resolved detector; single photon counting-energy resolved imaging systems; small animal imaging; thick COBRA;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC), 2012 IEEE

Conference_Location

Anaheim, CA

ISSN

1082-3654

Print_ISBN

978-1-4673-2028-3

Type

conf

DOI

10.1109/NSSMIC.2012.6551842

Filename

6551842