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Variants
Scenario Scenario ID Procedure Adult RRL Peds RRL Appropriateness Category
Cervicocranial arterial dissection suspected on imaging or clinical exam, next imaging study 3183778
MRA head and neck without IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually appropriate
MRI head and neck without IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually appropriate
CTA head and neck with IV contrast
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		Usually appropriate
Arteriography cervicocerebral
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		May be appropriate
MRA head and neck with IV contrast
0 mSv
O 		0 mSv [ped]
O 		May be appropriate
(Disagreement)
MRI head and neck with IV contrast
0 mSv
O 		0 mSv [ped]
O 		May be appropriate
(Disagreement)
MRI head and neck without and with IV contrast
0 mSv
O 		0 mSv [ped]
O 		May be appropriate
CT head without IV contrast
1-10 mSv
☢☢☢ 		0.3-3 mSv [ped]
☢☢☢ 		May be appropriate
US duplex Doppler transcranial and carotid artery
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
CT head with IV contrast
1-10 mSv
☢☢☢ 		0.3-3 mSv [ped]
☢☢☢ 		Usually not appropriate
CT head without and with IV contrast
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		Usually not appropriate