Home Osteonecrosis
Scenario Scenario ID Procedure Adult RRL Peds RRL Appropriateness Category
Osteonecrosis suspected, knee, radiography normal, next imaging study 3195726
MRI knee without IV contrast
0 mSv
O
0 mSv [ped]
O
Usually appropriate
MRI knee without and with IV contrast
0 mSv
O
0 mSv [ped]
O
May be appropriate
CT knee without IV contrast
<0.1 mSv
0.03-0.3 mSv [ped]
☢☢
May be appropriate
CT knee with IV contrast
<0.1 mSv
0.03-0.3 mSv [ped]
☢☢
Usually not appropriate
CT knee without and with IV contrast
<0.1 mSv
0.03-0.3 mSv [ped]
☢☢
Usually not appropriate
Bone scan knee
1-10 mSv
☢☢☢

Usually not appropriate