TABLE 1

Categorization of Scanners into Groups of Like Quantitative Performance

Manufacturer	Scanner model	Scanner grouping	No. of unique scanners	No. of phantom scans
GE Healthcare PET/CT scanner models	STE	STE	25	47
	VCT	STE	17	29
	LS	LS	16	23
	ST	ST	34	59
	RX	RX	7	16
	600	600–610	6	14
	610	600–610	0	0
	690	690–710	18	31
	710	690–710	4	6
	Total GE		127	225
Siemens PET/CT scanner models	Biograph TruePoint	Biograph TruePoint	43	83
	Biograph Duo	Biograph 2–6	7	12
	Biograph 6	Biograph 2–6	6	8
	Biograph mCT	mCT	23	36
	Total Siemens		79	139
Philips PET/CT scanner models	Gemini TF	Gemini TF	16	18
	Ingenuity	Ingenuity	1	1
	Gemini LXL	Gemini LXL	1	3
	Gemini GS2	Gemini GS2	6	10
	Gemini GXL	Gemini GXL	7	10
	Total Philips		31	42
Total	Total all vendors		237	406