Harmonization of standard uptake values across different positron emission tomography/computed tomography systems and different reconstruction algorithms: validation in oncology patients

EJNMMI Physics

Table 2 PET/CT scan and reconstruction algorithms

PET Scanner		Biograph mCT		Gemini TF 16
CT	Voltage/Intensity	120 kV/ ref mAs		120 kV/ 100 mAs
CT	Collimation/pitch	16 × 1.2 mm/pitch 0.8		16 × 1.5 mm/pitch 0.813
PET scan parameter	Bed motion speed	FlowMotion mode 2 mm/s (~ 100 s/bed)		40 s/bed
PET reconstruction algorithm	Reconstruction algorithm	OSEM	OSEM + PSF + TOF (Clinical)	BLOB-OS-TOF (Clinical)	BLOB-OS-TOF
	Iterations/Subsets	2/24	2/21	3/33	3/33
	Smoothing	No	5 mm	Normal*	Smooth A*
	Matrix	200 × 200	200 × 200	144 × 144	144 × 144
	EQ.PET filter (mm)	8	7.8	4.9	4.4

*The ‘normal’ and ‘smooth A’ smoothing options correspond to a relaxation parameter of 1.0 and 0.6 in the BLOB-OS-TOF algorithm, respectively