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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;5:3151–3153. doi: 10.1109/NSSMIC.2006.356543

Fig. 4.

Fig. 4

(a) A ring is a collection of blocks. Here we show a simple 4-sided ring consisting of 12 copies of Block A and 4 of Block B. Larger, more complex geometries can also be constructed, as shown in Figure 2. (b) A block detector system consists of one or more rings. Here we show a two ring tomograph created using the ring shown in (a) with the second ring rotated 45° from the first.