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In a first-ever unprovoked seizure in adults, [[MRI of the head|'''MRI''' of the head]] is generally the first investigation of choice because of its high sensitivity.<ref name="HoLawn2013"/> However, if MRI is not readily available,<ref name="HoLawn2013"/> or there is continued neurological deficit or other indication of an acute intracranial disease, then initial imaging with '''[[head CT]]''' is reasonable. If such CT is normal, MRI should still be considered if seizures recur or in the presence of focal electroencephalography (EEG) abnormalities.<ref name="HoLawn2013">{{cite journal|last1=Ho|first1=K.|last2=Lawn|first2=N.|last3=Bynevelt|first3=M.|last4=Lee|first4=J.|last5=Dunne|first5=J.|title=Neuroimaging of first-ever seizure: Contribution of MRI if CT is normal|journal=Neurology: Clinical Practice|volume=3|issue=5|year=2013|pages=398–403|issn=2163-0402|doi=10.1212/CPJ.0b013e3182a78f25}} American Academy of Neurology</ref>

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