American Association of Physicists in Medicine (AAPM)
A*STAR-NUS Clinical Imaging and Research Centre (CIRC), Singapore 117599, Singapore.
Center for Advanced Medical Imaging Sciences, Division of Nuclear Medicine and Molecular
Imaging, Massachusetts General Hospital, Boston, Massachusetts 02114 and Radiology
Department, Harvard Medical School, Boston, Massachusetts 02115.
Radiology Department, Harvard Medical School, Boston, Massachusetts 02115 Department
of Advanced Biomedical Sciences, University of Naples Federico II, Naples 80131, Italy;
and SDN Foundation, Institute of Diagnostic and Nuclear Development, Naples 80142,