Multi-slice Energy Resolving CT system using a THCOBRA detector operating in NeCH4

• Published in: Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Vol. 947
• Main Authors: Carramate, L.F.N.D., Silva, A.L.M., Azevedo, C.D.R., De Francesco, S., da Silva, A.M., Veloso, J.F.C.A.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 11.12.2019
• Subjects: Computerized tomography(CT); Micropattern gaseous detectors; Thick-COBRA; X-ray detectors; X-ray detectors; Computerized tomography(CT); Thick-COBRA; Micropattern gaseous detectors
• ISSN: 0168-9002; 1872-9576
• DOI: 10.1016/j.nima.2019.162738

A 2D-Thick-COBRA based detector with 10 × 10 cm2 active area operating in Ne/CH4 (95/5) flow mode, was applied to X-ray Computed Tomography (CT). The CT system is based on a third generation scanner with the object motion provided by a stepper motor. Multi-slice acquisitions of a Poly(methyl methacrylate) phantom and of a sea snail were done and the cross-sectional images were used to perform tri-dimensional (3D) visualization of the objects. Both kind of images (cross-sectional and 3D) are presented. Cross-sectional images using energy intervals of the spectrum are shown. Also, a simulation study of the influence of discharges (intrinsic to the MicroPatterned Gaseous Detector operation) in the resulting cross-sectional image was done and presented, showing no significant influence on the final image.