Speaker
Description
Anger Cameras have been widely used in nuclear medicine, presenting, however, limitations in detection efficiency for higher photon energies and sensitivity due to the presence of a lead collimator. Compton Cameras (CC) are potential competitors, primarily because they improve sensitivity in imaging radioactive sources by eliminating the mechanical collimator. In a CC, physical collimation is not used, conferring the potential to improve the quality of nuclear medicine images and reduce patients’ radiation exposure. The detection of scattered photons and recoil electrons, as well as energy determination allows the construction of a conic surface indicating the possible region of the photon’s primary interaction. The intersection of all conic surfaces shows the most probable location of the source.
A CC based on a Gaseous Detector is being developed within the DRIM group [1], with the potential to enhance the sensitivity compared to other CC concepts, since it detects scattered photons across a 4π solid angle using only one detector. In this scope, a simulation study was conducted with a radioactive point source to evaluate the feasibility of the proposed solution, whose results will be presented, namely, photon and electron interactions, energy spectra, and reconstructed images.