| High Energy Positron Imaging (HEPI) is a new technology. The idea of positron im aging can be traced back to early 1950′s. HEPI imaging is formed by positron em itter radionuclide produced by cyclotron, such as 15O, 13N, 11C and 18F, which are most abandant elements in human body. Clinical applications of HEPI have been witnessed rapidly in recent years. HEPI imaging can be obtained by both PET and SPECT, namely high energy collimation i maging, Mdecular Coincidence Detection (MCD) and positron emission tomography. |
