Gamma-ray imaging in a nuclear medicine facility using a compact and portable high-sensitivity omnidirectional Compton camera with detector rotation function

Abstract

  In this study, we observed leaked gamma rays in a nuclear medicine facility. As proposed in a previous study, we used a portable, high-sensitivity omnidirectional Compton camera with a detector rotation function, which observes gamma rays where the air dose is approximately background level. The measurements were carried out in the nuclear medicine facility of the National Cancer Center East Hospital in front of a hot cell where PET (Positron Emission Tomography) radioactive tracers are elaborated. As a result of the measurements acquired, it was demonstrated that this method can function as a next-generation environmental radiation observation device, thus replacing existing area monitors such as ionization chambers.