on Neurologic Imaging:

Procedure Appropriateness Category Relative Radiation Level CT neck with IV contrast Usually Appropriate ☢ ☢ ☢ MRI neck without and with IV contrast Usually Appropriate O MRI neck without IV contrast May Be Appropriate O US neck May Be Appropriate O CT neck without IV contrast May Be Appropriate ☢ ☢ ☢ CT neck without and with IV contrast Usually Not Appropriate ☢ ☢ ☢ CTA neck with IV contrast Usually Not Appropriate ☢ ☢ ☢ FDG-PET/CT skull base to mid-thigh Usually Not Appropriate ☢ ☢ ☢ ☢ FDG-PET/MRI skull base to mid-thigh Usually Not Appropriate ☢ ☢ ☢ MRA neck without and with IV contrast Usually Not Appropriate O Arteriography cervicocerebral Usually Not Appropriate ☢ ☢ ☢ MRA neck without IV contrast Usually Not Appropriate O