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Table 3 Average absolute quantitative errors and average absolute changes of source activities

From: Effects of attenuation map accuracy on attenuation-corrected micro-SPECT images

Isotope

Quantitative error a

Changes induced by map inaccuracies (rotation, shift and/or μ change) with respect to references

15°

15°

1 mm X

3 mm X

1 mm Y

3 mm Y

1 mm Z

3 mm Z

0 mm

0 mm

0 mm

3 mm X

  

1.0 μ

1.0 μ

1.0 μ

1.0 μ

1.0 μ

1.0 μ

1.0 μ

0.9 μ

1.1 μ

1.1 μ

125I

2.1 ± 6.5

1.5 ± 1.1

3.9 ± 3.1

1.6 ± 1.2

4.6 ± 3.3

0.9 ± 0.9

2.3 ± 1.9

2.1 ± 1.8

5.8 ± 1.7

6.1 ± 1.9

5.8 ± 5.4

201Tl

3.3 ± 2.5

0.6 ± 0.6

1.7 ± 1.6

0.6 ± 0.4

1.5 ± 1.2

0.5 ± 0.5

1.2 ± 0.8

0.8 ± 0.8

3.2 ± 0.8

3.3 ± 0.9

4.4 ± 3.2

99mTc

2.0 ± 2.5

0.6 ± 0.5

1.5 ± 1.4

0.4 ± 0.4

1.0 ± 1.0

0.5 ± 0.4

1.3 ± 1.2

0.5 ± 0.4

2.8 ± 0.6

2.9 ± 0.7

3.3 ± 2.2

111In

2.0 ± 2.7

0.6 ± 0.4

1.6 ± 1.3

0.4 ± 0.3

1.2 ± 0.8

0.3 ± 0.4

0.8 ± 1.0

0.5 ± 0.8

2.7 ± 0.6

2.8 ± 0.6

3.9 ± 2.2

  1. Average absolute quantitative errors (in %) of source activities in reference rat SPECT images were calculated with respect to dose calibrator measurements (1st data column), and average absolute changes (in %) in source activities due to attenuation map inaccuracies were calculated with respect to reference images (2nd to 11th data column). aObtained from [16].