Simultaneous PET/MRI with 13C magnetic resonance spectroscopic imaging (hyperPET): phantom-based evaluation of PET quantification

EJNMMI Physics

Table 1 Overview of measurements performed

Scan number	¹³C-MRSI acquisition	PET acquisition	PET gantry	FDG activity	Phantom	Comparisons
1, 3, 5, 7, 9, 11, 13, 15	ON	ON	ON	34–16 MBq	NEMA	PET, ¹³C-MRSI acq. ON versus OFF
2, 4, 6, 8, 10, 12, 14, 16	OFF	ON	ON	34–16 MBq	NEMA	PET, ¹³C-MRSI acq. ON versus OFF
17–20, 25–28	ON	OFF	ON	41–31 MBq	mMR water	¹³C-MRSI, PET gantry ON versus OFF; with high activity
21–24	ON	OFF	OFF	41–31 MBq		¹³C-MRSI, PET gantry ON versus OFF; with high activity
29–32, 37–40	ON	OFF	ON	0.21–0.18 MBq		¹³C-MRSI, PET gantry ON versus OFF; with low activity
33–36	ON	OFF	OFF	0.21–0.18 MBq		¹³C-MRSI, PET gantry ON versus OFF; with low activity

Scan numbers are consecutive in time. The total FDG activity of the phantom is given at the start and end of each measurement series (1–16, 17–28, and 29–40, respectively)