Skip to main content
. 2013 Jan 31;3:7. doi: 10.1186/2191-219X-3-7

Table 1.

Quantitative errors and relative changes of VOI activities

Isotope
 VOI
 Quantitative error
 Changes induced by map inaccuracies (rotation, shift and/orμchange) with respect to references
0°
 0°
 0°
 0°
 15°
 0°
 0°
 15°
1 mmX
 3 mmX
 1 mmY
 3 mmY
 0 mm
 0 mm
 0 mm
 3 mmX
      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
 1
 −20.4
 0.1
 0.4
 −0.5
 −4.0
 0.0
 −4.9
 5.2
 5.3
2
 −11.8
 0.7
 1.1
 −0.2
 −1.0
 −0.2
 −4.8
 5.0
 6.2
3
 −7.9
 −1.1
 −4.0
 −1.5
 −4.5
 −1.4
 −4.2
 4.3
 −0.8
201Tl
 1
 −5.8
 0.0
 0.1
 −0.1
 −1.5
 0.0
 −2.6
 2.7
 2.7
2
 6.1
 −0.4
 −1.4
 0.0
 −0.3
 −0.1
 −2.5
 2.6
 3.0
3
 4.4
 0.2
 −0.3
 0.6
 1.4
 −0.7
 −2.3
 2.3
 0.0
99mTc
 1
 −2.0
 0.1
 0.2
 −0.2
 −1.7
 0.0
 −2.2
 2.2
 2.1
2
 6.1
 −0.3
 −1.1
 −0.1
 −0.3
 −0.1
 −2.1
 2.2
 2.4
3
 −8.3
 0.4
 −0.2
 0.5
 1.3
 −0.2
 −1.8
 1.9
 0.2
111In 1
 −4.7
 0.0
 0.1
 −0.2
 −1.4
 0.0
 −2.1
 2.1
 2.2
2
 −3.5
 −0.4
 −1.2
 0.0
 −0.3
 −0.1
 −2.0
 2.0
 2.5
3 3.2 0.0 −1.1 0.4 0.9 −0.9 −1.9 1.9 0.6

Quantitative errors (in %) of VOI activities in reference phantom SPECT images were calculated with respect to dose calibrator measurements (1st data column), and relative changes (in %) in VOI activities due to attenuation map inaccuracies were calculated with respect to reference images (2nd to 9th data column).