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Table 1 Contrast recovery and background variability parameters when applying MR-based AC

From: NEMA image quality phantom measurements and attenuation correction in integrated PET/MR hybrid imaging

Sphere size [mm]

Radioactive / Non-radioactive

aContrast recovery [%]

aBackground variability [%]

10

Radioactive

16.8 ± 1.9

4.8 ± 0.8

13

Radioactive

31.7 ± 2.9

4.0 ± 0.4

17

Radioactive

52.7 ± 3.0

3.6 ± 0.3

22

Radioactive

64.8 ± 4.1

3.4 ± 0.4

28

Non-radioactive

68.9 ± 1.5

3.2 ± 0.4

37

Non-radioactive

76.1 ± 0.6

3.1 ± 0.3

  1. a The values represent the mean values and standard deviation of four independent measurements for the reconstruction: 3 iterations, 21 subsets, 172 matrix and 4 mm Gaussian filtering