An Adaptive Thresholding Method for BTV Estimation Incorporating PET Reconstruction Parameters: A Multicenter Study of the Robustness and the Reliability

Table 2

PET/CT scanners: reconstruction parameters.

	Discovery; ST; S1	Discovery; ST; S2	Discovery STE; S3	Discovery; 600; S4	Discovery; 600; S5	Discovery; 690; S6	Biograph; 16 Hi-REZ; S7	Biograph 6; true V; S8	Gemini; XL; S9	Gemini; TF; S10	Gemini; TF; S11
Reconstruction protocol	FORE-OSEM	FORE-OSEM	3D-OSEM	3D-OSEM	3D-OSEM	3D-OSEM	FORE-OSEM	FORE-OSEM	LOR-RAMLA	TF-MLEM	TF-MLEM
Number of iterations	14, 42	16, 40	14, 42	16, 32	16, 48	54, 108	16, 24	16, 42	66	60, 99	60, 99
Transaxial smoothing; FWHM (mm)	6, 9, 13	5.5, 8.2, 11	6, 8, 11	6, 8, 11	5.5, 8.2, 11	4, 6, 8	4, 6, 8	4, 6, 8	—	—	—
Axial smoothing; (kernel)	—	—	1 : 4 : 1	1 : 4 : 1	1 : 4 : 1	1 : 6 : 1; 1 : 4.1; 1 : 2 : 1	—	—	—	—	—
Kernel width (cm)	—	—	—	—	—	—	—	—	—	14.1	14.1, 18.
Relaxation ()	—	—	—	—	—	—	—	—	0.5, 0.7, 1	0.5, 0.7, 1	0.5, 0.7, 1
Voxel dimensions; × × (mm)
Number of reconstructions	6	6	6	6	6	18	12	6	3	6	9
Number of data points	1641	1651	1676	1785	1727	5368	3456	1676	814	1993	2466

Only available with 99 iterations.