Functional MRI of human motor cortex using a conventional MRI system
Functional MRI of the brain was performed with motor task activation in normal volunteers and a patient with a meningioma using conventional FLASH sequences and a 2.0 T MRI system. A bright signal intensity in the motor cortex was observed in all cases. In the single-slice studies, the right-sided finger task produced an increase of 6.67 ± 4.36% in the signal intensity of the left motor cortex, while the left-sided finger task increased the signal by 6.09 ± 3.34% in the right motor cortex. There were no significant differences between the sides. In the multiple-slice studies, the activated motor cortex was also seen as a bright signal. Preoperative mapping of the meningioma showed that the motor cortex was displaced posteriorly by the tumour. Our clinical study demonstated the possibility of functional MRI with a standard MRI system and conventional FLASH sequences. Useful information can be obtained by preoperative mapping of the motor cortex.
Key wordsFunctional magnetic resonance imaging Motor cortex
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