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Variants
Scenario Scenario ID Procedure Adult RRL Peds RRL Appropriateness Category
Headache, severe, sudden onset, maximal severity within an hour, initial imaging 3196284
CT head without IV contrast
1-10 mSv
☢☢☢ 		0.3-3 mSv [ped]
☢☢☢ 		Usually appropriate
CTA head with IV contrast
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		May be appropriate
Arteriography cervicocerebral
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		Usually not appropriate
MRA head with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRA head without and with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRA head without IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRI head with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRI head without and with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRI head without IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRV head with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRV head without and with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRV head without IV contrast
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
CTV head with IV contrast
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		Usually not appropriate
Scenario Scenario ID Procedure Adult RRL Peds RRL Appropriateness Category
Headache, primary migraine, neuro exam normal, initial imaging 3084082
Arteriography cervicocerebral
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		Usually not appropriate
MRA head with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRA head without and with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRA head without IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRI head with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRI head without and with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRI head without IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRV head with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRV head without and with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRV head without IV contrast
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
CT head without IV contrast
1-10 mSv
☢☢☢ 		0.3-3 mSv [ped]
☢☢☢ 		Usually not appropriate
CTA head with IV contrast
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		Usually not appropriate
CTV head with IV contrast
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		Usually not appropriate
Headache, tension type, neuro exam normal, initial imaging 3196286
Arteriography cervicocerebral
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		Usually not appropriate
MRA head with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRA head without and with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRA head without IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRI head with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRI head without and with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRI head without IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRV head with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRV head without and with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRV head without IV contrast
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
CT head without IV contrast
1-10 mSv
☢☢☢ 		0.3-3 mSv [ped]
☢☢☢ 		Usually not appropriate
CTA head with IV contrast
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		Usually not appropriate
CTV head with IV contrast
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		Usually not appropriate
Scenario Scenario ID Procedure Adult RRL Peds RRL Appropriateness Category
Headache, primary trigeminal autonomic cephalalgias, initial imaging 3158447
MRI head without and with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually appropriate
MRI head without IV contrast
0 mSv
O 		0 mSv [ped]
O 		May be appropriate
Arteriography cervicocerebral
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		Usually not appropriate
MRA head with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRA head without and with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRA head without IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRI head with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRV head with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRV head without and with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRV head without IV contrast
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
CT head without IV contrast
1-10 mSv
☢☢☢ 		0.3-3 mSv [ped]
☢☢☢ 		Usually not appropriate
CTA head with IV contrast
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		Usually not appropriate
CTV head with IV contrast
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		Usually not appropriate
Scenario Scenario ID Procedure Adult RRL Peds RRL Appropriateness Category
Headache, intracranial hypertension features, initial imaging 3084057
MRI head without and with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually appropriate
MRI head without IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually appropriate
CT head without IV contrast
1-10 mSv
☢☢☢ 		0.3-3 mSv [ped]
☢☢☢ 		Usually appropriate
MRV head with IV contrast
0 mSv
O 		0 mSv [ped]
O 		May be appropriate
MRV head without and with IV contrast
0 mSv
O 		0 mSv [ped]
O 		May be appropriate
MRV head without IV contrast
0 mSv
O 		0 mSv [ped]
O 		May be appropriate
CTV head with IV contrast
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		May be appropriate
Arteriography cervicocerebral
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		Usually not appropriate
MRA head with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRA head without and with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRA head without IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRI head with IV contrast
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
CTA head with IV contrast
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		Usually not appropriate
Scenario Scenario ID Procedure Adult RRL Peds RRL Appropriateness Category
Headache, intracranial hypotension features, initial imaging 3074252
MRI head without and with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually appropriate
MRI thoracic spine with IV contrast
0 mSv
O 		0 mSv [ped]
O 		May be appropriate
(Disagreement)
MRI thoracic spine without and with IV contrast
0 mSv
O 		0 mSv [ped]
O 		May be appropriate
MRI thoracic spine without IV contrast
0 mSv
O 		0 mSv [ped]
O 		May be appropriate
Arteriography cervicocerebral
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		Usually not appropriate
MRA head with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRA head without and with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRA head without IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRI head with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRI head without IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRV head with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRV head without and with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRV head without IV contrast
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
CT head without IV contrast
1-10 mSv
☢☢☢ 		0.3-3 mSv [ped]
☢☢☢ 		Usually not appropriate
CTA head with IV contrast
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		Usually not appropriate
CTV head with IV contrast
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		Usually not appropriate
Scenario Scenario ID Procedure Adult RRL Peds RRL Appropriateness Category
Headache, new onset, pregnant, initial imaging 3155935
MRI head without IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually appropriate
CT head without IV contrast
1-10 mSv
☢☢☢ 		0.3-3 mSv [ped]
☢☢☢ 		Usually appropriate
MRV head without IV contrast
0 mSv
O 		0 mSv [ped]
O 		May be appropriate
CTV head with IV contrast
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		May be appropriate
Arteriography cervicocerebral
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		Usually not appropriate
MRA head with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRA head without and with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRA head without IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRI head with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRI head without and with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRV head with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRV head without and with IV contrast
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
CTA head with IV contrast
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		Usually not appropriate
Headache, new onset, peripartum period, initial imaging 3196291
MRI head without IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually appropriate
CT head without IV contrast
1-10 mSv
☢☢☢ 		0.3-3 mSv [ped]
☢☢☢ 		Usually appropriate
MRV head without IV contrast
0 mSv
O 		0 mSv [ped]
O 		May be appropriate
CTV head with IV contrast
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		May be appropriate
Arteriography cervicocerebral
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		Usually not appropriate
MRA head with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRA head without and with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRA head without IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRI head with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRI head without and with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRV head with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRV head without and with IV contrast
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
CTA head with IV contrast
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		Usually not appropriate
Headache, new pattern, pregnant, initial imaging 3196292
MRI head without IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually appropriate
CT head without IV contrast
1-10 mSv
☢☢☢ 		0.3-3 mSv [ped]
☢☢☢ 		Usually appropriate
MRV head without IV contrast
0 mSv
O 		0 mSv [ped]
O 		May be appropriate
CTV head with IV contrast
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		May be appropriate
Arteriography cervicocerebral
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		Usually not appropriate
MRA head with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRA head without and with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRA head without IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRI head with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRI head without and with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRV head with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRV head without and with IV contrast
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
CTA head with IV contrast
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		Usually not appropriate
Headache, new pattern, peripartum period, initial imaging 3196293
MRI head without IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually appropriate
CT head without IV contrast
1-10 mSv
☢☢☢ 		0.3-3 mSv [ped]
☢☢☢ 		Usually appropriate
MRV head without IV contrast
0 mSv
O 		0 mSv [ped]
O 		May be appropriate
CTV head with IV contrast
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		May be appropriate
Arteriography cervicocerebral
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		Usually not appropriate
MRA head with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRA head without and with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRA head without IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRI head with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRI head without and with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRV head with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRV head without and with IV contrast
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
CTA head with IV contrast
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		Usually not appropriate
Scenario Scenario ID Procedure Adult RRL Peds RRL Appropriateness Category
Headache, increasing frequency, initial imaging 3163049
MRI head without and with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually appropriate
MRI head without IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually appropriate
CT head without IV contrast
1-10 mSv
☢☢☢ 		0.3-3 mSv [ped]
☢☢☢ 		Usually appropriate
Arteriography cervicocerebral
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		Usually not appropriate
MRA head with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRA head without and with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRA head without IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRI head with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRV head with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRV head without and with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRV head without IV contrast
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
CTA head with IV contrast
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		Usually not appropriate
CTV head with IV contrast
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		Usually not appropriate
Headache, increasing severity, initial imaging 3163050
MRI head without and with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually appropriate
MRI head without IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually appropriate
CT head without IV contrast
1-10 mSv
☢☢☢ 		0.3-3 mSv [ped]
☢☢☢ 		Usually appropriate
Arteriography cervicocerebral
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		Usually not appropriate
MRA head with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRA head without and with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRA head without IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRI head with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRV head with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRV head without and with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRV head without IV contrast
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
CTA head with IV contrast
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		Usually not appropriate
CTV head with IV contrast
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		Usually not appropriate
Headache, fever, initial imaging 3196295
MRI head without and with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually appropriate
MRI head without IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually appropriate
CT head without IV contrast
1-10 mSv
☢☢☢ 		0.3-3 mSv [ped]
☢☢☢ 		Usually appropriate
Arteriography cervicocerebral
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		Usually not appropriate
MRA head with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRA head without and with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRA head without IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRI head with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRV head with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRV head without and with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRV head without IV contrast
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
CTA head with IV contrast
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		Usually not appropriate
CTV head with IV contrast
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		Usually not appropriate
Headache, neuro deficit, initial imaging 3196296
MRI head without and with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually appropriate
MRI head without IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually appropriate
CT head without IV contrast
1-10 mSv
☢☢☢ 		0.3-3 mSv [ped]
☢☢☢ 		Usually appropriate
Arteriography cervicocerebral
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		Usually not appropriate
MRA head with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRA head without and with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRA head without IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRI head with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRV head with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRV head without and with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRV head without IV contrast
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
CTA head with IV contrast
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		Usually not appropriate
CTV head with IV contrast
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		Usually not appropriate
Headache, cancer hx, initial imaging 3196297
MRI head without and with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually appropriate
MRI head without IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually appropriate
CT head without IV contrast
1-10 mSv
☢☢☢ 		0.3-3 mSv [ped]
☢☢☢ 		Usually appropriate
Arteriography cervicocerebral
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		Usually not appropriate
MRA head with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRA head without and with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRA head without IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRI head with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRV head with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRV head without and with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRV head without IV contrast
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
CTA head with IV contrast
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		Usually not appropriate
CTV head with IV contrast
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		Usually not appropriate
Headache, immunocompromised, initial imaging 3196298
MRI head without and with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually appropriate
MRI head without IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually appropriate
CT head without IV contrast
1-10 mSv
☢☢☢ 		0.3-3 mSv [ped]
☢☢☢ 		Usually appropriate
Arteriography cervicocerebral
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		Usually not appropriate
MRA head with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRA head without and with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRA head without IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRI head with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRV head with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRV head without and with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRV head without IV contrast
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
CTA head with IV contrast
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		Usually not appropriate
CTV head with IV contrast
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		Usually not appropriate
Headache, older age of onset, initial imaging 3196299
MRI head without and with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually appropriate
MRI head without IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually appropriate
CT head without IV contrast
1-10 mSv
☢☢☢ 		0.3-3 mSv [ped]
☢☢☢ 		Usually appropriate
Arteriography cervicocerebral
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		Usually not appropriate
MRA head with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRA head without and with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRA head without IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRI head with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRV head with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRV head without and with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRV head without IV contrast
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
CTA head with IV contrast
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		Usually not appropriate
CTV head with IV contrast
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		Usually not appropriate
Headache, post traumatic onset, initial imaging 3196300
MRI head without and with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually appropriate
MRI head without IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually appropriate
CT head without IV contrast
1-10 mSv
☢☢☢ 		0.3-3 mSv [ped]
☢☢☢ 		Usually appropriate
Arteriography cervicocerebral
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		Usually not appropriate
MRA head with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRA head without and with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRA head without IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRI head with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRV head with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRV head without and with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRV head without IV contrast
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
CTA head with IV contrast
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		Usually not appropriate
CTV head with IV contrast
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		Usually not appropriate
Scenario Scenario ID Procedure Adult RRL Peds RRL Appropriateness Category
Headache, no red flags, initial imaging 3196302
Arteriography cervicocerebral
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		Usually not appropriate
MRA head with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRA head without and with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRA head without IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRI head with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRI head without and with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRI head without IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRV head with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRV head without and with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRV head without IV contrast
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
CT head without IV contrast
1-10 mSv
☢☢☢ 		0.3-3 mSv [ped]
☢☢☢ 		Usually not appropriate
CTA head with IV contrast
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		Usually not appropriate
CTV head with IV contrast
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		Usually not appropriate