久保, 均 Department of Medical Imaging, Institute of Health Biosciences, the University of Tokushima Graduate School
大谷, 環樹 Program in Biomedical Information Science, the University of Tokushima Graduate School 徳島大学 教育研究者総覧 KAKEN研究者をさがす
大塚, 秀樹 Department of Medical Imaging, Institute of Health Biosciences, the University of Tokushima Graduate School 徳島大学 教育研究者総覧 KAKEN研究者をさがす
原田, 雅史 Department of Radiology, Institute of Health Biosciences, the University of Tokushima Graduate School 徳島大学 教育研究者総覧 KAKEN研究者をさがす
PET/CT for small animals
Purpose : The purpose of this study was to evaluate the impact of a cyclotron on small-animal PET equipment installed directly above the cyclotron. Methods : The cyclotron equipment was HM-12, which has two targets, and the PET/CT equipment was Inveon. The equipment was installed in conformity to Japanese law and regulations. Before installation of the PET/CT equipment, the radiation dose, radio waves, and static and fluctuating magnetic fields were measured at the position where it would be placed, both when the cyclotron was in use and when it was not in use. After installation of the PET/CT, natural background and emission counts were measured at the same place under the same conditions. Results : An increase of radiation dose was observed when the target nearest the PET equipment was used. There were no distinct effects of radio waves or static and fluctuating magnetic fields. A significant increase of emission counts, approximately 300 cpm, was observed when the nearest target was used. Conclusions : Though radio waves and static and fluctuating magnetic fields generated by running cyclotron had no influence, a significant increase in emission count was observed. Careful attention should be paid to this influence when very low-radioactivity PET measurements are done.
The journal of medical investigation : JMI
LID201604155003.pdf 1.54 MB