Table 1.

Examined reconstruction protocols (n = 16)

	Iterations and subsets	SCF
Quantitative reconstructionsa
Clinical acquisition protocolb	4i/10s	0.41 and 1.10
	5i/15s	0.41 and 1.10
	24i/10s	0.41 and 1.10
NEMA acquisition protocolc	4i/10s	0.41 and 1.10
	5i/15s	0.41 and 1.10
	24i/10s	0.41 and 1.10
Diagnostic reconstructionsd
Clinical acquisition protocolb	2i/10se	0.41 and 1.10e
NEMA acquisition protocolc	2i/10s	0.41 and 1.10

^aWithout postfiltering,

^bSixty projections with 20 s/projection,

^cOne hundred twenty projections with 10 s/projection,

^dWith postfiltering (Butterworth, cut-off frequency = 0.5 cycles/cm, power = 10)

^eInstitutional standard for diagnostic imaging, 2i/10s and SCF = 1.10

SCF scatter weighting factor