Optimization of SPECT/CT imaging protocols for quantitative and qualitative 99mTc SPECT

EJNMMI Physics

Table 1 Examined reconstruction protocols (n = 16)

	Iterations and subsets	SCF
Quantitative reconstructions^a
Clinical acquisition protocol^b	4i/10s	0.41 and 1.10
	5i/15s	0.41 and 1.10
	24i/10s	0.41 and 1.10
NEMA acquisition protocol^c	4i/10s	0.41 and 1.10
	5i/15s	0.41 and 1.10
	24i/10s	0.41 and 1.10
Diagnostic reconstructions^d
Clinical acquisition protocol^b	2i/10s^e	0.41 and 1.10^e
NEMA acquisition protocol^c	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