Table 2.

Clinical parameters of PET/CT scanners

Scanner	Gemini GXL	Gemini TF64	IQ5	Ingenuity TF
Vendor	Philips	Philips	GE	Philips
CT scanning
Tube voltage	120 kV	120 kV	120 kV	120 kV
Effective tube	current auto-mA up to 120 mA	100 mA	12 ~ 390 mA (Smart mA: Noise Index 25)	100 mA (variable by Dose Right)
Detector configuration	16 × 1.5 mm	64 × 0.625 mm	16 × 1.25 mm	64 × 0.625 mm
Slice thickness, mm	2	2	3.75	2
Transverse FOV, mm	600	600	700	600
PET scanning
2-[18F]FDG injection dose, MBq/kg	4	3	3.7	3.7
Scan time for each bed, mm	90	90	180	90
TOF	No	Yes	No	Yes
PET reconstruction
Reconstruction	LOR-RAMLA	3D-OSEM	3D-OSEM + PSF + Q-clear	3D-OSEM
Iterations	2	3	4	3
Subsets	n/a	33	12	33
Smoothing	n/a	n/a	Gaussian	n/a
FWHM of filter, mm	5.3	4.7	4.3	4.8
Matrix	144 × 144	144 × 144	192 × 192	144 × 144
Pixel size, mm	4 × 4 × 4	4 × 4 × 4	3.125 × 3.125 × 3.125	4 × 4 × 4

2-[¹⁸F]FDG: 2-deoxy-2-[¹⁸F]fluoro-D-glucose, FWHM: full-width at half maximum, LOR-RAMLA: line-of-response row-action maximum likelihood algorithm, OSEM: ordered-subset expectation maximization, PSF: point spread function, TOF: time of flight