Table 2.

Ranges of activity and count rates, per phantom

Acquisition type	Phantom	Total no. of acquisitionsa	Activity range (MBq)	Photopeak count rate range (cps)	Wide-spectrum (18–680 keV) count rate range (cps)
Planar	Air-2D	34	19–15,123	208–97,638	851–375,605
Tomographic	Air-3D	35	32–15,274	327–92,275	1342–370,033
	CTDI-10	21	13–12,053	93–64,027	665–367,557
	CTDI-16	17	16–13,540	83–61,456	695–377,300
	CTDI-32	21	21–18,625	50–60,328	513–380,170
	Jaszczak	30	44–18,985	307–55,270	2650–386,006

^aThis is the total number of acquisitions performed for each phantom, but only subsets of acquisitions with an activity within the usable range of the system were used to derive the calibration factor and dead-time constant (Tables 3 and 4)