Wedge-shaped scintillation crystals for positron emission tomography.
作者： R. Lecomte , D. Schmitt , E. LeBel
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摘要: The use of wedge-shaped scintillation crystals for positron emission tomography is reevaluated with the aim delimiting its range benefit. A linear attenuation simulation model used to generate detector geometric aperture functions, and investigation carried out in terms a newly introduced shape-independent definition spatial resolution, "spectral resolution." Contrary previous expectations, it concluded that shaped do not improve performance high resolution detection systems, either or without intercrystal septa. However, wedges are found be useful lower systems boundaries applicability estimated NaI, BaF2, GSO, BGO scintillators.
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