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. Author manuscript; available in PMC: 2016 Jul 7.
Published in final edited form as: Phys Med Biol. 2015 Jun 25;60(13):5343–5358. doi: 10.1088/0031-9155/60/13/5343

Figure 8.

Figure 8

Average contrast results for all spheres (16 spheres per image times 5 images) as a function of low activity concentration for scanners with varying crystal width and timing resolution. Results are shown for 72 cm long scanners using 20 mm long LYSO crystals without DOI information at the iteration numbers where maximum ALROC is achieved. The total scan time is equivalent to 10 minutes for imaging a 100 cm long patient or object. The error bars are ± 0.5 standard deviation of contrast over all 80 spheres.