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

EJNMMI Research

Table 3 Preclinical PET motion effect measurements

			Units	Measurements
			Units	Gated	Gating+	Gating+ with phase shift	Ungated
Number of frames (phase increment = 360°/number)				16	16	90	1
Kidney VOI, n = 102	Average kidney uptake	Average VOI value, average of all gates	Relative values	1.01	1.01	1.01	1.00
	% SD	Average uptake across gates	Percentage	2.69	1.47	1.47
	Maximum displacement	Average of all scans (SD of all scans)	mm	1.50 (0.56)	1.10 (0.75)	1.10 (0.75)
Liver profile, n = 34	Liver boundary displacement		mm	3.25	3.04	3.05
Shoulder VOI, n = 84	% SD in VOI	Average of all gates	Relative values	1.53	1.05	1.05	1.00
Global COM, n = 84	Maximum COM displacement	Average of all scans (SD of all scans)	mm	0.71 (0.46)	0.43 (0.41)	0.43 (0.41)

Summary of VOI, line profile, and COM measurements in ungated, gated, and gating+ images across the population of preclinical PET scans. All numbers are average values of population or all appropriate population scans.