Very high position resolution gamma imaging with resistive plate chambers

• Autor(es): Blanco, A. ; 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.
• Data: 2006
• Identificador Persistente: http://hdl.handle.net/10316/4392
• Origem: Estudo Geral - Universidade de Coimbra
• Assunto(s): Gaseous detectors; Photodetectors
• Tipo de Documento: Artigo
• Idioma: Inglês

Descrição

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. http://www.sciencedirect.com/science/article/B6TJM-4K5HV7F-9/1/7b655e08199d2b28acc8050106c2271c