title: Update on the magnetic resonance imaging core of the Alzheimer's disease neuroimaging initiative.
abstract: Functions of the Alzheimer's Disease Neuroimaging Initiative (ADNI) magnetic resonance imaging (MRI) core fall into three categories: (1) those of the central MRI core laboratory at Mayo Clinic, Rochester, Minnesota, needed to generate high quality MRI data in all subjects at each time point; (2) those of the funded ADNI MRI core imaging analysis groups responsible for analyzing the MRI data; and (3) the joint function of the entire MRI core in designing and problem solving MR image acquisition, pre-processing, and analyses methods. The primary objective of ADNI was and continues to be improving methods for clinical trials in Alzheimer's disease. Our approach to the present ("ADNI-GO") and future ("ADNI-2," if funded) MRI protocol will be to maintain MRI methodological consistency in the previously enrolled "ADNI-1" subjects who are followed up longitudinally in ADNI-GO and ADNI-2. We will modernize and expand the MRI protocol for all newly enrolled ADNI-GO and ADNI-2 subjects. All newly enrolled subjects will be scanned at 3T with a core set of three sequence types: 3D T1-weighted volume, FLAIR, and a long TE gradient echo volumetric acquisition for micro hemorrhage detection. In addition to this core ADNI-GO and ADNI-2 protocol, we will perform vendor-specific pilot sub-studies of arterial spin-labeling perfusion, resting state functional connectivity, and diffusion tensor imaging. One of these sequences will be added to the core protocol on systems from each MRI vendor. These experimental sub-studies are designed to demonstrate the feasibility of acquiring useful data in a multicenter (but single vendor) setting for these three emerging MRI applications.
authors.affiliation: Department of Radiology, Mayo Clinic, Rochester, MN, USA. jack.clifford@mayo.edu
authors.forename: Clifford R
authors.initials: CR
authors.lastname: Jack
authors.forename: Matt A
authors.initials: MA
authors.lastname: Bernstein
authors.forename: Bret J
authors.initials: BJ
authors.lastname: Borowski
authors.forename: Jeffrey L
authors.initials: JL
authors.lastname: Gunter
authors.forename: Nick C
authors.initials: NC
authors.lastname: Fox
authors.forename: Paul M
authors.initials: PM
authors.lastname: Thompson
authors.forename: Norbert
authors.initials: N
authors.lastname: Schuff
authors.forename: Gunnar
authors.initials: G
authors.lastname: Krueger
authors.forename: Ronald J
authors.initials: RJ
authors.lastname: Killiany
authors.forename: Charles S
authors.initials: CS
authors.lastname: Decarli
authors.forename: Anders M
authors.initials: AM
authors.lastname: Dale
authors.forename: Owen W
authors.initials: OW
authors.lastname: Carmichael
authors.forename: Duygu
authors.initials: D
authors.lastname: Tosun
authors.forename: Michael W
authors.initials: MW
authors.lastname: Weiner
mesh_terms: D000544:Alzheimer Disease / Q000134:cerebrospinal fluid / Q000150:complications / Q000175:diagnosis*; D016229:Amyloid beta-Peptides / Q000134:cerebrospinal fluid; D001921:Brain / Q000000981:diagnostic imaging / Q000473:pathology*; D001931:Brain Mapping; D003072:Cognition Disorders / Q000134:cerebrospinal fluid / Q000000981:diagnostic imaging / Q000209:etiology; D055106:Genome-Wide Association Study; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods* / Q000639:trends*; D010446:Peptide Fragments / Q000134:cerebrospinal fluid; D049268:Positron-Emission Tomography / Q000379:methods
chemical_list: D016229:Amyloid beta-Peptides; D010446:Peptide Fragments; C075222:amyloid beta-protein (1-42)
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