Optimal clinical protocols for total-body 18F-FDG PET/CT examination under different activity administration plans.

"Declarations Ethics approval and consent to participateAll procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. This prospective study was approved by the clinical research ethics committee of Nanfang Hospital Southern Medical University. Written informed consent was obtained from all enrolled patients. Consent for publicationNot applicable. Competing interestsJiatai Feng and Jingyi Wang are employees of United Imaging Healthcare. Wanbang Xu works at the Department of Traditional Chinese Medicine in Guangdong Institute for Drug Control. The other authors working at Nanfang PET Center in Nanfang Hospital Southern Medical University have full control of the data and Nanfang hospital do not have any revenue sharing with other two Institutes. No other potential conflicts of interest relevant to this article exist including employment, royalties, stock options, or patients. Competing interests Jiatai Feng and Jingyi Wang are employees of United Imaging Healthcare. Wanbang Xu works at the Department of Traditional Chinese Medicine in Guangdong Institute for Drug Control. The other authors working at Nanfang PET Center in Nanfang Hospital Southern Medical University have full control of the data and Nanfang hospital do not have any revenue sharing with other two Institutes. No other potential conflicts of interest relevant to this article exist including employment, royalties, stock options, or patients."

"Funding This work is supported by the National Natural Science Foundation of China (No. 11205081), Science and Technology Planning Project of Guangdong Province of China (No.2014A020212175) and President Foundation Project of Nanfang Hospital, Southern Medical University (No.2020L002 and No. 2021C017)."