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. Author manuscript; available in PMC: 2013 Jun 25.
Published in final edited form as: Phys Med Biol. 2010 Nov 16;55(23):7149–7174. doi: 10.1088/0031-9155/55/23/001

Figure 4.

Figure 4

Pictures of un-multiplexed and multiplexed modules. (a) Un-multiplexed dual-PSAPD module. There are a total of ten terminals (two high voltage and eight low voltage terminals). The scintillation crystal arrays will be placed on top of the PSAPDs. The alumina frame provides mechanical support and facilitates thermal regulation. (b) Multiplexed dual-PSAPD module. For this new design, there are a total of six terminals (two high voltage and four low voltage terminals), compared to ten terminals in the un-multiplexed design. The scintillation crystal arrays were already placed on top of the PSAPDs in this picture, and their back sides are showing.