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PubMed · 9233007

[Brain functional MRI using 3D-SPGR pulse sequence].

Y Watanabe·T Nishimura
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Abstract

We reported the effects of motor cortex stimulation of normal volunteers using conventional MR imaging techniques on standard 1.5 T clinical scanner. The imaging technique was an optimized conventional 2D and 3D spoiled GRASS. In the 3D-SPGR measurement, a slab of 96 mm with 32 partition was evaluated in sagital direction. The motor cortex stimulation was achieved by touching each finger to thumb in a sequential, self-paced, and repetitive manner. During stimulation, areas of increased signal intensity were identified in the sensorimotor cortex with both 2D and 3D SPGR method. The 3D-SPGR method in sagital direction is rather insensitive to inflow effects, thus signal increases with 3D-SPGR method is mainly due to the blood oxygenation level dependent effects.

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BrainHumansImage EnhancementMagnetic Resonance ImagingMotor CortexOxyhemoglobinsPhysical StimulationEnglish AbstractJournal Article

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Y Watanabe, T Nishimura. 1997. [Brain functional MRI using 3D-SPGR pulse sequence].. https://pubmed.ncbi.nlm.nih.gov/9233007/

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