1 Center for Advanced Molecular Imaging and Translation, Chang Gung Memorial Hospital, Linkou 333, Taiwan ; Department of Nuclear Medicine, Chang Gung Memorial Hospital, No. 5, Fu-Hsin Street, Kweishan, Linkou, Taoyuan 333, Taiwan.
2 INSERM, UMR1101 LaTIM, CHRU Brest, 29609 Brest, France.
3 Division of Diagnostic Imaging, Department of Imaging Physics, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA.
4 Department of Electrical Engineering, Chang Gung University, Taoyuan 333, Taiwan.