Seizures and epilepsy.

Procedure Appropriateness Category Relative Radiation Level CT head without IV contrast Usually Appropriate ☢☢☢ MRI head without IV contrast Usually Appropriate O MRI head without and with IV contrast May Be Appropriate O CT head with IV contrast Usually Not Appropriate ☢☢☢ CT head without and with IV contrast Usually Not Appropriate ☢☢☢ FDG-PET/CT brain Usually Not Appropriate ☢☢☢☢ MEG Usually Not Appropriate O MRI functional (fMRI) head without IV contrast Usually Not Appropriate O HMPAO SPECT or SPECT/CT brain ictal and interictal Usually Not Appropriate ☢☢☢