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

EJNMMI Research

Table 1 Hardware-vs.-software compariso n

Scan number	Events in scan (trues), ×10 ⁸	Median respiratory period (s)			Maximum COM displacement (mm)			Motion observed by all four independent observers
Scan number	Events in scan (trues), ×10 ⁸	Software	Hardware	Difference	Software	Hardware	Difference	Motion observed by all four independent observers
1	1.4	1.00	0.98	0.02	1.16	1.20	−0.04	Yes
2	1.4	1.20	1.23	−0.03	0.47	0.33	0.14	Yes
3	1.6	1.10	1.06	0.04	0.96	0.91	0.05	Yes
4	1.6	1.20	1.21	−0.01	1.37	1.89	−0.52	Yes
5	1.6	1.30	1.26	0.04	0.28	0.37	−0.09	Yes
6	1.9	1.10	1.07	0.03	1.48	1.40	0.08	Yes
7	2.1	1.20	1.22	−0.02	0.19	0.21	−0.02	Yes
8	2.1	1.20	1.15	0.05	1.43	1.51	−0.08	Yes
9	2.3	1.10	1.12	−0.02	0.94	0.92	0.02	Yes
10	2.5	0.90	1.18	−0.28	0.26	0.16	0.10	No
11	2.6	1.20	1.23	−0.03	1.38	1.55	−0.17	Yes
12	2.6	1.40	1.35	0.04	0.21	0.20	0.01	Yes
13	2.7	1.20	1.24	−0.04	0.58	0.58	−0.01	Yes
14	2.9	1.20	1.15	0.05	1.08	1.03	0.04	Yes
15	2.9	1.10	1.06	0.04	0.34	0.32	0.02	Yes
16	3.0	1.20	1.22	−0.02	0.26	0.33	−0.07	Yes
17	3.1	1.20	1.30	−0.10	0.21	0.26	−0.05	No
18	3.1	1.20	1.17	0.03	0.35	0.37	−0.03	Yes
19	3.5	1.10	1.14	−0.04	0.19	0.23	−0.04	Yes
20	3.5	1.20	1.16	0.04	0.16	0.19	−0.03	Yes
21	3.9	1.10	1.06	0.04	1.36	1.27	0.09	Yes
22	4.2	1.20	1.16	0.04	1.49	1.51	−0.02	Yes
23	4.8	1.10	1.07	0.03	1.30	1.47	−0.17	Yes
24	4.9	1.10	1.10	0.00	1.07	1.12	−0.06	Yes

Summary of median respiratory periods and maximum COM displacement for 24 scans acquired using both software and hardware gating triggers.