title: Functional magnetic resonance neuroimaging data acquisition techniques.
abstract: Functional MRI studies of human brain require rapid data acquisition techniques, to map dynamic changes with sufficient anatomical coverage. In addition, task activation studies employing functional MRI require a high scan sensitivity, in order to discriminate the small, activation-related signal changes from background noise. An overview is given of current fast scan methods, which are sensitized to detect susceptibility changes related to task-induced changes in blood oxygenation. Sources of artifacts are discussed, as well as their effect on image quality.
authors.affiliation: Laboratory of Diagnostic Radiology Research, OIR, NIH, Bethesda, Maryland 20892, USA. jhd@helix.nih.gov
authors.forename: J H
authors.initials: JH
authors.lastname: Duyn
authors.forename: Y
authors.initials: Y
authors.lastname: Yang
authors.forename: J A
authors.initials: JA
authors.lastname: Frank
authors.forename: V S
authors.initials: VS
authors.lastname: Mattay
authors.forename: L
authors.initials: L
authors.lastname: Hou
mesh_terms: D016477:Artifacts; D001921:Brain / Q000098:blood supply*; D001931:Brain Mapping / Q000295:instrumentation*; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008279:Magnetic Resonance Imaging / Q000295:instrumentation*; D010101:Oxygen Consumption / Q000502:physiology; D012039:Regional Blood Flow / Q000502:physiology; D012680:Sensitivity and Specificity