Objective To evaluate the value of highenergypositron imaging in the diagnosis of colon neoplasm.
目的评估高能正电子成像技术在结肠肿瘤诊断中的临床实用价值。
2
We use EGS4 code to simulate the electron-gamma shower of high-energy electrons in a medium, optimize target thickness, and analyze positron distributions in phase space.