If fMRI is not an invasive neuroimaging technique and used by neuroscience researchers, then fMRI is neither a noninvasive neuroimaging technique nor provides a spatial resolution of brains.
Something is either an invasive neuroimaging technique or a noninvasive neuroimaging technique.  All noninvasive neuroimaging techniques provide a spatial resolution of brains. If a technique provides a spatial resolution of brains, then it is a measurement of brain activity.  All measurements of brain activity are used by neuroscience researchers. FMRI is either a measurement of brain activity or a noninvasive neuroimaging technique.
∀x (InvasiveNeuroimagingTechnique(x) ∨ NoninvasiveNeuroimagingTechnique(x))   ∀x (NoninvasiveNeuroimagingTechnique(x) → ProvidesSpatialResolutionOfBrains(x))   ∀x (ProvidesSpatialResolutionOfBrains(x) → MeasurementOfBrainActivity(x))   ∀x (MeasurementOfBrainActivity(x) → UsedByNeuroscienceResearchers(x))  MeasurementOfBrainActivity(fMRI) ⊕ NoninvasiveNeuroimagingTechnique(fMRI)