Using correlated CT images in compensation for attenuation in PET (positron emission tomography) image reconstruction

Xiaolin Yu; Chin-Tu Chen; R. Bartlett; Charles A. Pelizzari; Caesar Ordonez

doi:10.1117/12.47738

1 March 1991 Using correlated CT images in compensation for attenuation in PET (positron emission tomography) image reconstruction

Xiaolin Yu, Chin-Tu Chen, R. Bartlett, Charles A. Pelizzari, Caesar Ordonez

Author Affiliations +

Proceedings Volume 1396, Applications of Optical Engineering: Proceedings of OE/Midwest '90; (1991) https://doi.org/10.1117/12.47738
Event: Applications of Optical Engineering: Proceedings of OE/Midwest '90, 1990, Rosemont, IL, United States

Abstract

Applying structural information from x-ray computed tomograghy (CT) to image reconstruction in positron emission tomography (PET) for compensation of the effect of photon attenuation can provide improved quality of the reconstructed PET images. CT and PET scans can be registered precisely using a surface-matching technique. Anatomical maps are then obtained by reslicing the CT images along the PET image planes. Attenuation coefficient maps for the corresponding PET images can be derived from the anatomical maps by considering the difference in photon energies observed in CT and in PET. These attenuation coefficient maps are reprojected to produce a set of attenuation correction factors for each projection profile. PET images reconstructed using these attenuation correction factors exhibit significant reduction in noise. 1.

Citation Download Citation

Xiaolin Yu, Chin-Tu Chen, R. Bartlett, Charles A. Pelizzari, and Caesar Ordonez "Using correlated CT images in compensation for attenuation in PET (positron emission tomography) image reconstruction", Proc. SPIE 1396, Applications of Optical Engineering: Proceedings of OE/Midwest '90, (1 March 1991); https://doi.org/10.1117/12.47738

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