Attenuation Correction for Small Animal PET Images: A Comparison of Two Methods

<table class="table-group" id="tab5"><tr><td><table class="table"><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr class="thead"><td align="left"> </td><td align="center">Roi counts (cps)</td><td align="center">RV (%)</td></tr><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr><td align="left">Original PET image</td><td align="center"> </td><td align="center"> </td></tr><tr><td align="left"> Myocardium</td><td align="center">520.35</td><td align="center">—</td></tr><tr><td align="left"> Ventricle</td><td align="center">352.63</td><td align="center">—</td></tr><tr><td align="left">CT-AC image</td><td align="center"> </td><td align="center"> </td></tr><tr><td align="left"> Myocardium</td><td align="center">858.38</td><td align="center">39.4%</td></tr><tr><td align="left"> Ventricle</td><td align="center">589.99</td><td align="center">40.2%</td></tr><tr><td align="left">SE-AC image</td><td align="center"> </td><td align="center"> </td></tr><tr><td align="left"> Myocardium</td><td align="center">785.43</td><td align="center">30.9%</td></tr><tr><td align="left"> Ventricle</td><td align="center">537.87</td><td align="center">31.4%</td></tr><tr class="table-tr"><td colspan="3"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

Counts measured in an ROI inside the left ventricle and inside the myocardium of the <sup>18</sup>F-FDG rat image and of the AC ones. The recovery values calculated using (<a href="https://static.hindawi.com/articles/cmmm/volume-2013/103476/figures/#EEq4">4</a>) are shown in the last column of the table for both AC methods.

Computational and Mathematical Methods in Medicine

tab5

Table 5

Table 5: Attenuation Correction for Small Animal PET Images: A Comparison of Two Methods 