Gating, enhanced gating, and beyond: information utilization strategies for motion management, applied to preclinical PET

EJNMMI Research

Table 2 Simulation measurements

Relative counts in image space	1	4	13	55	2,000
Maximum
Ungated	94	82	78	75	74
Gated	219	146	122	108	100
Gating+	95	125	115	108	100
Volume (70% maximum)
Ungated	57	144	177	194	199
Gated	6	17	49	84	99
Gating+	55	41	76	89	103
SUV (mean VOI/background)
Ungated	91	77	74	73	72
Gated	249	153	118	104	100
Gating+	92	122	110	105	100
FWHM
Ungated	144	174	183	187	188
Gated	38	68	90	98	100
Gating+	143	88	96	94	100

Summary of lesion measurements from simulations of hot lesion against colder background with a range of random noise levels added (see Figure 5). Numbers represent average measurements from a single gate of 500 simulations for each noise scenario. All measurements are presented as a percentage of the corresponding true noise-free values. The standardized uptake value (SUV) was calculated from for 70% threshold volume.