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. Author manuscript; available in PMC: 2011 Nov 7.
Published in final edited form as: IEEE Nucl Sci Symp Conf Rec (1997). 2006;4:2488–2493. doi: 10.1109/NSSMIC.2006.354416

Fig. 5.

Fig. 5

Measured count-rates using the 2.7D collimation and different cylinder sizes: (a) Trues, (b) Randoms, (c) Scattered, (d) NEC. Phantom size reduces the trues and NEC in a predictable manner. Randoms and scattered events tend to equalize for the different sized phantoms due to the competing effects of increased scattering and increased attenuation in the larger object.