Variability in PET image quality and quantification measured with a permanently filled 68Ge-phantom: a multi-center study

Sipilä, O.; Liukkonen, J.; Halme, H.-L.; Tolvanen, T.; Sohlberg, A.; Hakulinen, M.; Manninen, A.-L.; Tahvanainen, K.; Tunninen, V.; Ollikainen, T.; Kangasmaa, T.; Kangasmäki, A.; Vuorela, J.

doi:10.1186/s40658-023-00551-w

EJNMMI Physics

Table 1 Scanners and imaging parameters for routine protocols 1r–14r

From: Variability in PET image quality and quantification measured with a permanently filled ⁶⁸Ge-phantom: a multi-center study

Protocol number	Scanner			Routine protocol
Protocol number	Scanner	Software version	Axial detector length (cm)	Slice thickness (mm)	Pixel size (mm)	Matrix	Reconstruction	Iterations/subsets	Filter or β-factor	Phantom imaging time (s)	Phantom activity concentration (MBq/kg)	Background bias correction factor*
1r	Siemens Biograph mCT Flow	VG60A	21.6	5	2.04	400	OSEM, TOF + PSF	2/21	XYZ Gauss5,00	103–168	2.8–1.8	0.96
2r	Siemens Biograph mCT Flow	VG60A	21.6	5	3.18	256	OSEM, TOF + PSF	2/21	XYZ Gauss4,00	136	2.9	0.94
3r	Siemens Biograph Horizon Flow	VJ20B	22.1	5	4.11	180	OSEM, TOF + PSF	5/10	XYZ Gauss4,00	136	2.9	0.94
4r	Siemens Biograph mCT Flow	VG60A	21.6	3	3.18	256	OSEM, TOF + PSF	2/21	XYZ Gauss3,00	152	2.9	0.92
5r	Siemens Biograph Vision 600 Flow	VG75B	26.3	3	1.65	440	OSEM, TOF + PSF	4/5	All-pass	152	2.9	0.92
6r	Siemens Biograph mCT	VG60A	16.2	3	4.07	200	OSEM, TOF + PSF	2/21	XYZ Gauss2,00	123	2.9	1.11
7r	Siemens Biograph TruePoint	PET/CT 2009A	16.4	5	4.07	168	OSEM	4/8	XYZ Gauss5,00	204	2.6	0.96
8r	GE Discovery 690	52.00	15.7	3.27	3.65	192	OSEM, TOF + PSF	2/24	Cutoff 6.4 mm, z-axis standard	126	3.0	0.94
9r	GE Discovery 690	52.00	15.7	3.27	3.65	192	OSEM, TOF + PSF	2/24	Cutoff 6.4 mm, z-axis standard	112	3.2	0.95
10r	GE Discovery MI	pet_col_bb.31	20	2.79	2.73	256	Q.Clear	–	150	112	3.2	0.93
11r	GE Discovery MI	pet_col_bb.31	20	2.79	2.73	256	Q.Clear	–	150	126	3.0	0.98
12r	GE Discovery MI	pet_col_bb.31	25	2.8	2.73	256	Q.Clear	–	150	122	3.0	0.98
13r	GE Discovery MI	pet_col_bb.31	20	2.79	2.73	256	OSEM, TOF + PSF	3/16	Cutoff 5.0, z-axis standard	100–115	2.8–2.4	0.94
14r	GE Discovery STE (mobile installation)	41.04	15.7	3.27	5.47	128	3D IR	2/20	Cutoff 5.0, z-axis standard	253	2.1	0.91

^*Mean from 20 images with SDs of 0.002–0.008

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