Validation Of Gamma Camera Design By Using Gate

This project present the result of the simulation of gamma camera brand Toshiba model GCA-7100A by using GATE software. The aim for this project is to design the gamma camera simulation with the variation of radioactivity and the distance between collimator and point source. The material used for the collimator is tungsten instead of lead and other heavy materials. As for back compartment, the material used is pyrex slab. The materials are chose based on the materials used for the real gamma camera. For the nuclear radioactivity, Technetium-99m is used as it is proven to be good medical radioisotope. The result obtained shows that as the distance between collimator and point source increases, the result image become blurrer. The project continues with the analysis of the FWHM from the obtained result. It is found that the image become blur due to the increment of the size of the FWHM. The best distance is 10cm from point source to the collimator. This project also analyze the relationship between the radioactivity and the photon counts, as the radioactivity increases, the photon counts also increase.