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. Author manuscript; available in PMC: 2008 Dec 2.
Published in final edited form as: IEEE Trans Med Imaging. 2007 Jul;26(7):935–944. doi: 10.1109/TMI.2007.895485

Fig. 13.

Fig. 13

Noise-equivalent count-rate comparison for all considered collimation systems for each phantom diameter (A) 20 cm, (B) 27 cm, (C) 35 cm. NEC count rates are derived from the global count rates shown in Fig. 11. Note the change in vertical scale.