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Titolo:
Functional MRI for presurgical planning: problems, artefacts, and solutionstrategies
Autore:
Krings, T; Reinges, MHT; Erberich, S; Kemeny, S; Rohde, V; Spetzger, U; Korinth, M; Willmes, K; Gilsbach, JM; Thron, A;
Indirizzi:
Aachen Tech Univ, Univ Hosp, Dept Neuroradiol, D-52057 Aachen, Germany Aachen Tech Univ Aachen Germany D-52057 oradiol, D-52057 Aachen, Germany Aachen Tech Univ, Univ Hosp, Dept Neurosurg, D-52057 Aachen, Germany Aachen Tech Univ Aachen Germany D-52057 urosurg, D-52057 Aachen, Germany Aachen Tech Univ, Univ Hosp, Subdept Neuropsychol, D-52057 Aachen, GermanyAachen Tech Univ Aachen Germany D-52057 psychol, D-52057 Aachen, Germany Aachen Tech Univ, Univ Hosp, Dept Neurol, D-52057 Aachen, Germany Aachen Tech Univ Aachen Germany D-52057 Neurol, D-52057 Aachen, Germany Aachen Tech Univ, Univ Hosp, Interdisciplinary Ctr Clin Res Cent Nervous Syst, D-52057 Aachen, Germany Aachen Tech Univ Aachen Germany D-52057 us Syst, D-52057 Aachen, Germany
Titolo Testata:
JOURNAL OF NEUROLOGY NEUROSURGERY AND PSYCHIATRY
fascicolo: 6, volume: 70, anno: 2001,
pagine: 749 - 760
SICI:
0022-3050(200106)70:6<749:FMFPPP>2.0.ZU;2-H
Fonte:
ISI
Lingua:
ENG
Soggetto:
POSITRON-EMISSION-TOMOGRAPHY; SENSORY-MOTOR CORTEX; CENTRAL SULCUS; SOMATOSENSORY CORTEX; FRAMELESS STEREOTAXY; HUMAN-BRAIN; HAND AREA; LOCALIZATION; TUMORS; VESSELS;
Keywords:
functional MRI; presurgical planning; motor cortex;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Life Sciences
Citazioni:
41
Recensione:
Indirizzi per estratti:
Indirizzo: Krings, T Aachen Tech Univ, Univ Hosp, Dept Neuroradiol, Pauwelsstr 30, D-52057 Aachen, Germany Aachen Tech Univ Pauwelsstr 30 Aachen Germany D-52057 , Germany
Citazione:
T. Krings et al., "Functional MRI for presurgical planning: problems, artefacts, and solutionstrategies", J NE NE PSY, 70(6), 2001, pp. 749-760

Abstract

Ojectives - Presurgical mapping of motor function is a widely used clinical application of functional (f) MRI, employing the blood oxygenation level dependent contrast. The aim of this study was to report on 3 years experience of 194 fMRI studies on the representation of motor function in 103 patients and to describe the problems and artefacts that were typically present. Methods - An evaluation was carried out to determine whether the patients'age, type or location of the tumourous lesion, severity of the paresis, orthe tasks used during the investigation have an effect on artefacts of fMRI studies and how these artefacts are best overcome. Results - Functional MRI identified the motor regions in 85% of all investigated paradigms. In 11% of the investigated patients no information at allon functional localisation was obtained. A draining vein within the central sulcus was present in all patients that showed activation within the parenchyma of the precentral gyrus but also in three patients in whom no parenchymal activation was present. Head movement artefacts were the most frequent cause for fMRI failure, followed by low signal to noise ratio. Motion artefacts were correlated with the degree of paresis and with the functional task. Tasks involving more proximal muscles led to significantly more motionartefacts when compared with tasks that primarily involved distal muscles. Mean MR signal change during task performance was 2.5%. Conclusions - Most of the artefacts of functional MRI can be reliably detected and at least in part be reduced or eliminated with the help of mathematical algorithms, appropriate pulse sequences and tasks, and probably most important-by evaluating the fMRI raw data - that is, the MR signal time courses.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 03/04/20 alle ore 20:29:58