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Home Acute Trauma to the Knee
Variants
Scenario Scenario ID Procedure Adult RRL Peds RRL Appropriateness Category
Knee trauma, significant, possible dislocation, initial imaging 3079750
Radiography knee
<0.1 mSv
☢ 		<0.03 mSv [ped]
☢ 		Usually appropriate
CTA lower extremity with IV contrast
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		Usually appropriate
Arteriography lower extremity
0.1-1mSv
☢☢ 		0.3-3 mSv [ped]
☢☢☢ 		May be appropriate
MRA knee without and with IV contrast
0 mSv
O 		0 mSv [ped]
O 		May be appropriate
MRI knee without IV contrast
0 mSv
O 		0 mSv [ped]
O 		May be appropriate
CT knee with IV contrast
<0.1 mSv
☢ 		0.03-0.3 mSv [ped]
☢☢ 		May be appropriate
(Disagreement)
CT knee without IV contrast
<0.1 mSv
☢ 		0.03-0.3 mSv [ped]
☢☢ 		May be appropriate
US knee
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MR arthrography knee
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRA knee without IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
MRI knee without and with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
CT knee without and with IV contrast
<0.1 mSv
☢ 		0.03-0.3 mSv [ped]
☢☢ 		Usually not appropriate
Bone scan with SPECT or SPECT/CT knee
1-10 mSv
☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		Usually not appropriate