title: MR-Based Cardiac and Respiratory Motion-Compensation Techniques for PET-MR Imaging.
abstract: Cardiac and respiratory motion cause image quality degradation in PET imaging, affecting diagnostic accuracy of the images. Whole-body simultaneous PET-MR scanners allow for using motion information estimated from MR images to correct PET data and produce motion-compensated PET images. This article reviews methods that have been proposed to estimate motion from MR images and different techniques to include this information in PET reconstruction, in order to overcome the problem of cardiac and respiratory motion in PET-MR imaging. MR-based motion correction techniques significantly increase lesion detectability and contrast, and also improve accuracy of uptake values in PET images.
authors.affiliation: Division of Imaging Sciences and Biomedical Engineering, Department of Biomedical Engineering, King's College London, St. Thomas' Hospital, 4th Floor, Lambeth Wing, Westminster Bridge Road, London SE1 7EH, UK. Electronic address: camila.munoz@kcl.ac.uk.
authors.forename: Camila
authors.initials: C
authors.lastname: Munoz
authors.affiliation: Division of Imaging Sciences and Biomedical Engineering, Department of Biomedical Engineering, King's College London, St. Thomas' Hospital, 4th Floor, Lambeth Wing, Westminster Bridge Road, London SE1 7EH, UK.
authors.forename: Christoph
authors.initials: C
authors.lastname: Kolbitsch
authors.affiliation: Division of Imaging Sciences and Biomedical Engineering, Department of Biomedical Engineering, King's College London, St. Thomas' Hospital, 4th Floor, Lambeth Wing, Westminster Bridge Road, London SE1 7EH, UK.
authors.forename: Andrew J
authors.initials: AJ
authors.lastname: Reader
authors.affiliation: Division of Imaging Sciences and Biomedical Engineering, Department of Biomedical Engineering, King's College London, St. Thomas' Hospital, 4th Floor, Lambeth Wing, Westminster Bridge Road, London SE1 7EH, UK.
authors.forename: Paul
authors.initials: P
authors.lastname: Marsden
authors.affiliation: Division of Imaging Sciences and Biomedical Engineering, Department of Biomedical Engineering, King's College London, St. Thomas' Hospital, 4th Floor, Lambeth Wing, Westminster Bridge Road, London SE1 7EH, UK.
authors.forename: Tobias
authors.initials: T
authors.lastname: Schaeffter
authors.affiliation: Division of Imaging Sciences and Biomedical Engineering, Department of Biomedical Engineering, King's College London, St. Thomas' Hospital, 4th Floor, Lambeth Wing, Westminster Bridge Road, London SE1 7EH, UK.
authors.forename: Claudia
authors.initials: C
authors.lastname: Prieto
mesh_terms: D016477:Artifacts; D006321:Heart / Q000000981:diagnostic imaging*; D006801:Humans; D007089:Image Enhancement / Q000379:methods; D008279:Magnetic Resonance Imaging / Q000379:methods*; D009068:Movement; D064847:Multimodal Imaging / Q000379:methods*; D019047:Phantoms, Imaging; D049268:Positron-Emission Tomography / Q000379:methods*; D012119:Respiration; D012137:Respiratory System / Q000000981:diagnostic imaging*
keywords: Cardiac motion; Motion compensation; PET-MR imaging; Respiratory motion