Transforming Static CT in Gated PET/CT Studies to Multiple Respiratory Phases

Discrepancy between CT and PET data due to motion in PET/CT studies is a significant problem. PET is acquired over a period of time whereas CT is static. Thus attenuation correction of PET data with CT leads to wrong quantification and can result in wrong diagnosis and treatment. A solution based on...

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Bibliographic Details
Published in18th International Conference on Pattern Recognition (ICPR'06) Vol. 1; pp. 1026 - 1029
Main Authors Dawood, M., Buther, F., Lang, N., Jiang, X., Schafers, K.P.
Format Conference Proceeding
LanguageEnglish
Published IEEE 2006
Subjects
Biomedical optical imaging
Computed tomography
Detectors
Image motion analysis
Lesions
Lungs
Motion estimation
Optical attenuators
Positron emission tomography
X-rays
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Summary:Discrepancy between CT and PET data due to motion in PET/CT studies is a significant problem. PET is acquired over a period of time whereas CT is static. Thus attenuation correction of PET data with CT leads to wrong quantification and can result in wrong diagnosis and treatment. A solution based on respiratory gating and optical flow algorithms is presented. A combined local-global optical flow algorithm is used for motion estimation on PET data, the static CT is then transformed to different phases of the respiratory cycle. Corresponding PET and CT data is thus obtained for better attenuation correction. The results are verified on both software phantom and real patient data
ISBN:0769525210
9780769525211
ISSN:1051-4651
2831-7475
DOI:10.1109/ICPR.2006.1135