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Titolo:
IN-VIVO MEASUREMENT OF CHANGES IN VENOUS BLOOD-OXYGENATION WITH HIGH-RESOLUTION FUNCTIONAL MRI AT 0.95 TESLA BY MEASURING CHANGES IN SUSCEPTIBILITY AND VELOCITY
Autore:
HOOGENRAAD FGC; REICHENBACH JR; HAACKE EM; LAI S; KUPPUSAMY K; SPRENGER M;
Indirizzi:
VRIJE UNIV AMSTERDAM,ACAD HOSP,DEPT CLIN PHYS & ENGN,DE BOELELAAN 1117,POB 7057 NL-1007 MB AMSTERDAM NETHERLANDS WASHINGTON UNIV,MED CTR,MALLINCKRODT INST RADIOL ST LOUIS MO 63110 STANFORD UNIV,LUCAS MRS IMAGING CTR STANFORD CA 94305
Titolo Testata:
Magnetic resonance in medicine
fascicolo: 1, volume: 39, anno: 1998,
pagine: 97 - 107
SICI:
0740-3194(1998)39:1<97:IMOCIV>2.0.ZU;2-I
Fonte:
ISI
Lingua:
ENG
Soggetto:
HUMAN BRAIN; IN-VIVO; MOTOR CORTEX; 1.5 T; SIGNAL; CONTRAST; ACTIVATION; FLOW; IMAGES; FMRI;
Keywords:
OXYGENATION MEASUREMENTS; FMRI; SUSCEPTIBILITY MEASUREMENTS; FLOW MEASUREMENTS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
29
Recensione:
Indirizzi per estratti:
Citazione:
F.G.C. Hoogenraad et al., "IN-VIVO MEASUREMENT OF CHANGES IN VENOUS BLOOD-OXYGENATION WITH HIGH-RESOLUTION FUNCTIONAL MRI AT 0.95 TESLA BY MEASURING CHANGES IN SUSCEPTIBILITY AND VELOCITY", Magnetic resonance in medicine, 39(1), 1998, pp. 97-107

Abstract

High-resolution functional imaging experiments at 0.95 Tesla have been performed to determine the changes in oxygen saturation in pial veins during motor activation by measuring both flow and susceptibility changes in the blood. Averaging across subjects, mean values for the change of the oxygenation level, Delta Y = 0.16 +/- 0.08 (n = 7) and Delta Y = 0.13 +/- 0.09 (n = 4), were obtained from the susceptibility sensitive and the flow sensitive acquisitions, respectively. The results suggest that the increase in blood flow is largely uncoupled from the oxygen consumption. The quoted errors reflect mainly the intersubject variability. In addition, low-resolution echo planar imaging (EPI) measurements were performed on the same volunteers to quantify signal intensity changes. Using the measured change in oxygenation, the observedsignal changes in the EPI experiments can be attributed to a 5% venous blood volume.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/04/20 alle ore 06:46:24