. Author manuscript; available in PMC: 2021 Nov 12.

Published in final edited form as: IEEE Trans Med Imaging. 2021 Oct 27;40(11):3154–3164. doi: 10.1109/TMI.2021.3076191

TABLE I.

Comparison of Different Motion Estimation Methods for Different Gates. NMAE Is Calculated Based on the H Transformed by the Predicted T. The Run Time of Each Algorithm on CPU and GPU Is Shown on the Last Two Columns.

NMAE	Gate 1	Gate 2	Gate 3	Gate 4	Gate 5	Gate 6	GPU sec	CPU sec
w/o registration	0.1846	0.1066	0.0653	-	0.0659	0.1360	0	0
NRB [40]	0.1564↓^*	0.1347↑^*	0.1212↑^*	-	0.1288↑^*	0.1339↓^†	-	1489
VM [9]	0.1362↓^*	0.1202↑^*	0.1126↑^*	-	0.1144↑^*	0.1232↓^*	2.1	220
SAN [37]	0.1298↓^*	0.0882↓^*	0.0682↑^†	-	0.0751↑^*	0.1103↓^*	4.3	423
Ours	0.1098↓^*	0.0749↓^*	0.0582↓^*	-	0.0619↓^*	0.0908↓^*	0.54	59

↓ and ↑ Mean the NMAE Decrease and Increase as Compared to Baseline NMAE Without Registration, Respectively.

^“*”

Means the Difference to the Baseline NMAE Without Registration Are Significant at p < 0.05, While “†” Means Not Significant