title: Estimation of an image derived input function with MR-defined carotid arteries in FDG-PET human studies using a novel partial volume correction method.
abstract: Kinetic analysis of18F-fluorodeoxyglucose positron emission tomography data requires an accurate knowledge the arterial input function. The gold standard method to measure the arterial input function requires collection of arterial blood samples and is an invasive method. Measuring an image derived input function is a non-invasive alternative but is challenging due to partial volume effects caused by the limited spatial resolution of the positron emission tomography scanners. In this work, a practical image derived input function extraction method is presented, which only requires segmentation of the carotid arteries from MR images. The simulation study results showed that at least 92% of the true intensity could be recovered after the partial volume correction. Results from 19 subjects showed that the mean cerebral metabolic rate of glucose calculated using arterial samples and partial volume corrected image derived input function were 26.9 and 25.4 mg/min/100 g, respectively, for the grey matter and 7.2 and 6.7 mg/min/100 g for the white matter. No significant difference in the estimated cerebral metabolic rate of glucose values was observed between arterial samples and corrected image derived input function (p > 0.12 for grey matter and white matter). Hence, the presented image derived input function extraction method can be a practical alternative to noninvasively analyze dynamic18F-fluorodeoxyglucose data without the need for blood sampling.
authors.affiliation: 1 Institute of Nuclear Medicine, University College London, London, UK.
authors.forename: Hasan
authors.initials: H
authors.lastname: Sari
authors.affiliation: 1 Institute of Nuclear Medicine, University College London, London, UK.
authors.forename: Kjell
authors.initials: K
authors.lastname: Erlandsson
authors.affiliation: 2 Department of Clinical Physiology, Nuclear Medicine and PET, University of Copenhagen, Copenhagen, Denmark.
authors.forename: Ian
authors.initials: I
authors.lastname: Law
authors.affiliation: 2 Department of Clinical Physiology, Nuclear Medicine and PET, University of Copenhagen, Copenhagen, Denmark.
authors.forename: Henrik Bw
authors.initials: HB
authors.lastname: Larsson
authors.affiliation: 3 Centre for Medical Image Computing, University College London, London, UK.
authors.forename: Sebastien
authors.initials: S
authors.lastname: Ourselin
authors.affiliation: 3 Centre for Medical Image Computing, University College London, London, UK.
authors.forename: Simon
authors.initials: S
authors.lastname: Arridge
authors.affiliation: 4 Center for Medical Imaging, University College London, London, UK.
authors.forename: David
authors.initials: D
authors.lastname: Atkinson
authors.affiliation: 1 Institute of Nuclear Medicine, University College London, London, UK.|5 Centre for Medical Radiation Physics, University of Wollongong, Sydney, Australia.
authors.forename: Brian F
authors.initials: BF
authors.lastname: Hutton
mesh_terms: D000328:Adult; D001921:Brain / Q000098:blood supply / Q000000981:diagnostic imaging*; D002339:Carotid Arteries / Q000000981:diagnostic imaging* / Q000502:physiology; D019788:Fluorodeoxyglucose F18; D006801:Humans; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D007700:Kinetics; D008297:Male; D059906:Neuroimaging / Q000379:methods*; D019047:Phantoms, Imaging; D000072078:Positron Emission Tomography Computed Tomography / Q000379:methods*; D019275:Radiopharmaceuticals; D055815:Young Adult
chemical_list: D019275:Radiopharmaceuticals; D019788:Fluorodeoxyglucose F18
keywords: MRI; Positron emission tomography; brain imaging; carotid artery; kinetic modelling