title: Decreased signal intensity of cerebral cortex on T2-weighted MR images.
abstract: To define the frequency of decreased signal intensity (DSI) in cerebral cortex on T2-weighted images relative to aging and to the incidence of identifying white matter pathology, T2-weighted MR brain images of 906 patients consecutively examined between July 1989 and June 1991 were reviewed. MR images of cerebral cortex were divided into five areas: frontal lobe (F), pre- and postcentral gyri (C), parietal lobe (P), occipital lobe (O) and temporal lobe (T). Each area was separately and independently evaluated for the presence or absence of DSI. The frequency of DSI in each area was plotted against patients' ages. The severity of leukoaraiosis was evaluated in relation with DSI in each cortical area. Patients with DSI in area F numbered 61 (5.7%), in area C 236 (26.0%), in area P 174 (15.9%), in area O 428 (47.2%), and in area T 10 (1.1%). The number of patients with DSI in each area increased with age. The greater the severity of leukoaraiosis, the greater the chance of finding DSI of the cerebral cortex. The incidence of DSI in the cerebral cortex increased with the patient's age as well as with the severity of co-existent white matter pathology.
authors.affiliation: Department of Radiology, Yamanashi Medical University, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Oba
authors.forename: K
authors.initials: K
authors.lastname: Ohtomo
authors.forename: T
authors.initials: T
authors.lastname: Araki
authors.forename: G
authors.initials: G
authors.lastname: Uchiyama
authors.forename: S
authors.initials: S
authors.lastname: Monzawa
authors.forename: Y
authors.initials: Y
authors.lastname: Nogata
authors.forename: K
authors.initials: K
authors.lastname: Kachi
authors.forename: M Z
authors.initials: MZ
authors.lastname: Hussain
authors.forename: K
authors.initials: K
authors.lastname: Koizumi
authors.forename: Z
authors.initials: Z
authors.lastname: Shiozawa
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000375:Aging / Q000502:physiology; D001921:Brain / Q000473:pathology*; D001927:Brain Diseases / Q000473:pathology; D002540:Cerebral Cortex / Q000473:pathology; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies