Conference Proceedings

Investigation of respiratory motion gating with geometric sensitivity in allegro PET

J He, GJ O'Keefe, SJ Gong, T Saunder, G Jones, AM Scott, M Geso

2007 IEEE Nuclear Science Symposium Conference Record | Published : 2007


Respiratory motion artifacts can be a significant factor that limits the PET image quality. To improve image quality, surveillance systems have been developed to track the movements of the subject during scanning. Gating techniques utilizing the tracking information, are able to compensate for subject motion, thereby improving lesion detection. In this paper, we present a gating method that utilizes the geometric sensitivity gating (GSG) of a 3D-PET scanner system operating in list event acquisition mode. The count rate from a given organ, as a result of the geometric sensitivity, will depend on the axial location of the organ. As a result the respiratory phase can be determined from count r..

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