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Table 2 Contrast recovery and background variability parameters when applying CT-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

30.5 ± 1.3

3.8 ± 0.8

13

Radioactive

50.5 ± 2.4

3.0 ± 0.5

17

Radioactive

72.9 ± 1.9

2.5 ± 0.2

22

Radioactive

74.5 ± 3.3

2.3 ± 0.2

28

Non-radioactive

56.6 ± 2.3

2.0 ± 0.2

37

Non-radioactive

64.8 ± 0.9

1.8 ± 0.1

  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