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Titolo:
Quantifying head motion associated with motor tasks used in fMRI
Autore:
Seto, E; Sela, G; McIlroy, WE; Black, SE; Staines, WR; Bronskill, MJ; McIntosh, AR; Graham, SJ;
Indirizzi:
Sunnybrook & Womens Coll, Hlth Sci Ctr, Ctr Studies Aging, Toronto, ON M4N3M5, Canada Sunnybrook & Womens Coll Toronto ON Canada M4N 3M5 nto, ON M4N3M5, Canada Baycrest Ctr Geriatr Care, Rotman Res Inst, Toronto, ON M4N 3M5, Canada Baycrest Ctr Geriatr Care Toronto ON Canada M4N 3M5 o, ON M4N 3M5, Canada Univ Toronto, Dept Med Biophys, Toronto, ON M4N 3M5, Canada Univ Toronto Toronto ON Canada M4N 3M5 ophys, Toronto, ON M4N 3M5, Canada Univ Toronto, Grad Dept Rehabil Therapy, Toronto, ON M4N 3M5, Canada Univ Toronto Toronto ON Canada M4N 3M5 erapy, Toronto, ON M4N 3M5, Canada Univ Toronto, Dept Med Neurol, Toronto, ON M4N 3M5, Canada Univ Toronto Toronto ON Canada M4N 3M5 eurol, Toronto, ON M4N 3M5, Canada Univ Toronto, Dept Psychol, Toronto, ON M4N 3M5, Canada Univ Toronto Toronto ON Canada M4N 3M5 ychol, Toronto, ON M4N 3M5, Canada
Titolo Testata:
NEUROIMAGE
fascicolo: 2, volume: 14, anno: 2001,
pagine: 284 - 297
SICI:
1053-8119(200108)14:2<284:QHMAWM>2.0.ZU;2-E
Fonte:
ISI
Lingua:
ENG
Soggetto:
STIMULUS-CORRELATED MOTION; FUNCTIONAL MRI; HUMAN BRAIN; STROKE; REGISTRATION; LOCALIZATION; ARTIFACTS; MOVEMENT; CORTEX;
Keywords:
fMRI; motion; simulator; position tracking; stroke recovery;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
32
Recensione:
Indirizzi per estratti:
Indirizzo: Seto, E Sunnybrook & Womens Coll, Hlth Sci Ctr, Ctr Studies Aging, Toronto, ON M4N3M5, Canada Sunnybrook & Womens Coll Toronto ON Canada M4N 3M5 M4N3M5, Canada
Citazione:
E. Seto et al., "Quantifying head motion associated with motor tasks used in fMRI", NEUROIMAGE, 14(2), 2001, pp. 284-297

Abstract

In functional magnetic resonance imaging (fMRI) studies, long experiment times and small intensity changes associated with brain activation frequently lead to image artifacts due to head motion. Methods to minimize and correct for head motion by restraint, fast imaging, and retrospective image registration are typically combined but do not completely solve the problem, particularly for specific patient populations. As an initial step toward optimizing future designs of head restraints and improving motion correction techniques, the head motion characteristics of groups of stroke subjects, age-matched controls, and young adults were investigated with the aid of an AIR simulator and a highly accurate position tracking system. Position measurements were recorded during motor tasks involving either the hand or the foot. Head motion was strongly dependent on the subject group and less upon the task conditions based on ANOVA calculations (P < 0.05). The stroke subjects exhibited approximately twice the head motion compared to that of age-matched controls, and the latter's head motion was about twice that of youngadults. Moreover, the range of head motion in stroke subjects over all tasks was approximately 2 <plus/minus> 1 mm, with the motion occurring predominantly as translation in the superior-inferior direction and pitch rotation(nodding). These results lead to several recommendations on the design of fMRI motor experiments and suggest that improved motion correction strategies are required to examine such patient populations comprehensively. (C) 2001 Academic Press.

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Documento generato il 18/02/20 alle ore 04:07:12