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. 2016 Dec 10;2(1):94–100. doi: 10.1016/j.adro.2016.12.002

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© 2016 The Authors on behalf of the American Society for Radiation Oncology

This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

PMC Copyright notice

Difference in attenuation corrections between the current 4-dimensional positron emission tomography (PET) imaging protocol on the Siemens PET-CT scanner and the modified protocols for this study. (A) The same computed tomography (free breathing CT) is applied to every phase of the gated PET for attenuation correction in the original protocol. (B) Average intensity projection CT was acquired and applied to every phase of the gated PET for attenuation correction in a modified protocol. (C) Gated 4-dimensional CT was acquired and a phase-matched attenuation correction was applied for the gated 4-dimensional PET image in a modified protocol.