Abstract #2826
Artifacts in the segmentation-based attenuation correction of MR/PET and their impact on PET quantification
Cornelia Brendle 1 , Holger Schmidt 2 , Anja Oergel 1 , Ilja Bezrukov 2 , Mark Mueller 3 , Christina Pfannenberg 1 , and Nina Schwenzer 1
1
Radiology, Tuebingen, Baden-Wuerttemberg,
Germany,
2
Preclinical
Imaging, Tuebingen, Baden-Wuerttemberg, Germany,
3
Nuclear
Medicine, Tuebingen, Baden-Wuerttemberg, Germany
In this study the routinely used segmentation-based PET
attenuation correction map in hybrid MR/PET was analyzed
concerning artifacts in general and in suspicious PET
positive lesions as well as their impact on PET
quantification. Nearly 3 artifacts were found per
patient dataset with significant changes of PET
quantification in the lungs, at the body contours,
around metal implants and in the brain. PET positive
lesions especially around metal implants resulted in
significant changes of PET quantification. We recommend
checking attenuation correction maps for artifacts in
routine MR/PET examinations in order to avoid impairment
of lesion characterization and differentiation.
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