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. Author manuscript; available in PMC: 2010 May 20.
Published in final edited form as: IEEE Nucl Sci Symp Conf Rec (1997). 2009 Oct 24;2009(2009):3042–3047. doi: 10.1109/nssmic.2009.5401574

Fig. 5.

Fig. 5

Relations of noise metrics in background. From top to bottom: mean of image roughness (over realizations), and mean of NEMA style noise (over realization), plotted against the ensemble noise. Left column: the ROI size is fixed (22mm diameter) and variations include different reconstruction methods and post filtering options. Right column: no post filtering is applied, and variations include different reconstruction methods and ROI sizes. Error bars denote standard deviation across realizations, and the dash-dot line denotes the identity line.