Funding for this research was provided by:
Beijing Municipal Science & Technology Commission (Z151100003915133)
National Natural Science Foundation of China (81571713)
CAMS Innovation Fund for Medical Sciences (2016-I2M-4-003)
The Capital Health Research and Development of Special Project (2016-2-40115)
China Scholarship Council (201708110098)
Received: 21 March 2018
Accepted: 9 August 2018
First Online: 1 December 2018
Ethics approval and consent to participate
: All procedures performed in the 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.
: Informed consent was obtained from all individual participants included in the study.
: Nan Li and Heyu Wu are employees of SinoUnion Healthcare, which manufactures the PoleStar m660 scanner used in this manuscript. Hui Zhang serves as a member of the Board of Directors of SinoUnion Healthcare. No other potential conflicts of interest relevant to this article are reported.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.