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A novel method for respiratory motion gated with geometric sensitivity of the scanner in 3D PET He, J, O'Keefe, G, Gong, S, Jones, G, Saunders, T, Scott, A and Geso, M 2008, 'A novel method for respiratory motion gated with geometric sensitivity of the scanner in 3D PET', IEEE Transactions on Nuclear Science, vol. 55, no. 5, pp. 2557-2565. Document type: Journal Article Collection: Journal Articles Title A novel method for respiratory motion gated with geometric sensitivity of the scanner in 3D PET Author(s) He, J O'Keefe, G Gong, S Jones, G Saunders, T Scott, A Geso, M Year 2008 Journal name IEEE Transactions on Nuclear Science Volume number 55 Issue number 5 Start page 2557 End page 2565 Total pages 9 Publisher IEEE Abstract PET image quality can be significantly affected by respiratory motion artifacts. 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. As a result of the non-uniform geometric sensitivity, the count rate from a given organ, will depend on the axial location of the organ. Consequently the respiratory phase can be determined from count rate changes which are determined by suitable temporal resolution from the list-mode data stream. The GSG method has several advantages over existing methods; it only uses LOR events. It is non-invasive, no additional hardware device systems and patient preparation required. Using GATE (GEANT4 Application Tomographic Emission) and NCAT (NURBs(Non Uniform Rational B-Splines) Cardiac Torso) software packages, realistic simulations of respiratory motion demonstrate that GSG can be used for respiratory gating. The validation on clinical data demostrates that GSG is able to reduce respiratory motion artifacts. Subject Biological Physics Keyword(s) geometric sensitivity list-mode PET respiratory motion gating DOI - identifier 10.1109/TNS.2008.2001187 Copyright notice © 2008 IEEE. ISSN 0018-9499 Related Links Link Description http://dx.doi.org/10.1109/TNS.2008.2001187 Link to Published Version   Versions Version Filter Type Fri, 14 Jan 2011, 09:13:49 EST Wed, 18 Jun 2014, 00:38:30 EST Filtered Full Citation counts: Cited 29 times in Scopus Article | Citations Altmetric details: Access Statistics: 267 Abstract Views  -  Detailed Statistics Created: Fri, 14 Jan 2011, 08:00:00 EST by Catalyst Administrator