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EJNMMI Physics
Fig. 2 | EJNMMI Physics

Fig. 2

From: Evaluations of the performances of PET and MRI in a simultaneous PET/MRI instrument for pre-clinical imaging

Fig. 2

PET SNR in the presence of the MRI instrument. A phantom with fluorine-18 (a) at 19.43 MBq (525 µCi) was imaged using a PET insert outside the MRI magnet, (b) at 8.88 MBq (240 µCi) was imaged using a PET insert inside the MRI magnet without an active MRI acquisition, (c) at 12.58 MBq (340 µCi) was imaged using a PET insert inside the MRI magnet while a RARE MRI pulse sequence was run, and (d) at 11.1 MBq (300 µCi) was imaged using a PET insert inside the MRI magnet while a FISP MRI pulse sequence was run. Each data point represents a PET image that was recorded every 30 min over a 12 h time period. An ROI was drawn over the tube and also over a background region in each image to calculate SNR

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