Very high position resolution gamma imaging with resistive plate chambers

• Autor(a) principal: Blanco, A.
• Data de Publicação: 2006
• Outros Autores: Carolino, N., Correia, C. M. B. A., Fazendeiro, L., Ferreira, Nuno C., Marques, M. F. Ferreira, Marques, R. Ferreira, Fonte, P., Gil, C., Macedo, M. P.
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: http://hdl.handle.net/10316/4392; https://doi.org/10.1016/j.nima.2006.05.074
• topic: Gaseous detectors; Photodetectors

In this study we present experimental results from a first prototype of a positron emission tomography system based on the resistive plate chamber (RPC) technology. The system is composed of two counting heads, each one containing 16 single-gap RPC detectors capable of detecting the photon interaction point in the transaxial plane. Uniformity studies were performed for image resolution and sensitivity, yielding a rather uniform image resolution close to 0.3 mm FWHM across the field of view. The contribution of the photons noncolinearity effect to the intrinsic spatial resolution was also studied, causing a variation from 0.52 to 0.63 mm when the system diameter ranges from 60 to 120 mm, in agreement with calculations.