3D Alternating Direction TV-Based Cone-Beam CT Reconstruction with Efficient GPU Implementation

Table 2

Running time for related operation in the reconstruction (unit for time: seconds).

	Situation 1			Situation 2
	CPU	GPU	Speedup	CPU	GPU	Speedup
𝐷𝑗𝑓	0.030000	0.0002312	129.76	0.398274	0.0026197	152.03
𝐷^𝑇𝑗𝑓	0.042977	0.0003432	125.22	0.529065	0.0032604	162.27
𝑊𝑓	10.248665	0.058801	174.29	83.390976	0.452213	184.41
𝑊^𝑇𝑓	73.074226	0.399989	182.69	636.070923	3.151384	201.83