Optimisation of Simultaneous Tl-201/Tc-99m Dual Isotope Reconstruction with Monte-Carlo-Based Scatter Correction

Table 6

Contrast evaluation with NCAT phantoms. The table shows myocardium versus defect and myocardium versus left ventricle (LV) contrasts for optimised and unoptimised Tl-201/Tc-99m reconstruction and for pure Tl-201 reconstruction. The results were obtained using all the Monte Carlo simulated NCAT phantoms, and the contrasts are average values of the corresponding female and male phantoms. Only Tl-201 reconstruction results are shown.

Defect	Reconstruction	Myocardium versus defect contrast	Myocardium versus LV contrast	Reconstruction time (min)
ANT	Optimised	0.62	0.91	<3
	Unoptimised	0.61	0.91	<13
	Pure Tl-201	0.71	0.96	<1
INF	Optimised	0.80	0.94	<3
	Unoptimised	0.81	0.94	<13
	Pure Tl-201	0.90	0.97	<1
SEPT	Optimised	0.70	0.96	<3
	Unoptimised	0.67	0.95	<13
	Pure Tl-201	0.64	0.99	<1