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Titolo:
Accuracy and limitation of functional magnetic resonance imaging for identification of the central sulcus: Comparison with magnetoencephalography in patients with brain tumors
Autore:
Inoue, T; Shimizu, H; Nakasato, N; Kumabe, T; Yoshimoto, T;
Indirizzi:
Tohoku Univ, Sch Med, Dept Neurosurg, Aoba Ku, Sendai, Miyagi 9808574, Japan Tohoku Univ Sendai Miyagi Japan 9808574 Ku, Sendai, Miyagi 9808574, Japan Kohnan Hosp, Taihaku Ku, Sendai, Miyagi 9820012, Japan Kohnan Hosp SendaiMiyagi Japan 9820012 Ku, Sendai, Miyagi 9820012, Japan
Titolo Testata:
NEUROIMAGE
fascicolo: 6, volume: 10, anno: 1999,
pagine: 738 - 748
SICI:
1053-8119(199912)10:6<738:AALOFM>2.0.ZU;2-S
Fonte:
ISI
Lingua:
ENG
Soggetto:
SOMATOSENSORY EVOKED-POTENTIALS; PRIMARY MOTOR CORTEX; ECHO-PLANAR MRI; SENSORIMOTOR CORTEX; HAND AREA; LOCALIZATION; STIMULATION; STRATEGIES; ACTIVATION; GLIOMAS;
Keywords:
brain tumor; central sulcus; functional magnetic resonance imaging; magnetoencephalography;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
42
Recensione:
Indirizzi per estratti:
Indirizzo: Inoue, T Tohoku Univ, Sch Med, Dept Neurosurg, Aoba Ku, 1-1 Seiryo Machi, Sendai, Miyagi 9808574, Japan Tohoku Univ 1-1 Seiryo Machi Sendai Miyagi Japan 9808574 4, Japan
Citazione:
T. Inoue et al., "Accuracy and limitation of functional magnetic resonance imaging for identification of the central sulcus: Comparison with magnetoencephalography in patients with brain tumors", NEUROIMAGE, 10(6), 1999, pp. 738-748

Abstract

The aim of the present study was to clarify the accuracy and limitation offunctional magnetic resonance imaging (fMRI) for the identification of thecentral sulcus affected by brain tumors. Twelve normal volunteers and 11 patients with intracranial tumors adjacent to the central sulcus underwent fMRI and magnetoencephalography (MEG). Three patients were evaluated again after surgery. fMRI was performed with a 1.5 Tesla scanner during repetitiveopening and closing of each hand. Cross-correlation function was used to identify activation areas, and the central sulcus was defined as the nearestsulcus to the highest activation spats that were determined by elevating correlation coefficient threshold. Somatosensory-evoked fields were measuredusing a whole head MEG system. The central sulcus was defined as the nearest sulcus to the N20m for the median nerve stimulus. fMRI and MEG coincidedin defining the central sulcus in all 24 hemispheres of volunteers and all10 examined nonaffected hemispheres of patients. The fMRI-defined central sulcus coincided with the MET-defined central sulcus in nine (82%) but did not in two (18%) affected hemispheres of patients. The preoperative mismatch disappeared after surgery in one of the two patients. The present study indicates that fMRI successfully defined the central sulcus in most of the patients with brain tumors. However, in a few cases, fMRI was not reliable probably due to venous dow changes by tumor compression and/or compensational activity by brain tissues surrounding the primary sensorimotor cortex. For precise functional assessment of the brain affected by intracranial tumors, combination of fMRI and MEG will be recommended. (C) 1999 Academic Press.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/03/20 alle ore 11:56:23