ACR logo

ACR AC Portal

Home Imaging After Total Knee Arthroplasty
Variants
Scenario Scenario ID Procedure Adult RRL Peds RRL Appropriateness Category
Knee replaced, infection suspected, radiography performed, next imaging study 3196565
Image-guided aspiration knee

Varies
Varies 		Usually appropriate
US knee
0 mSv
O 		0 mSv [ped]
O 		May be appropriate
MRI 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
3-phase bone scan knee
1-10 mSv
☢☢☢
May be appropriate
WBC scan and sulfur colloid scan knee
10-30 mSv
☢☢☢☢
May be appropriate
Fluoroscopy knee
<0.1 mSv
☢
Usually not appropriate
CT arthrography knee
<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
CT knee without IV contrast
<0.1 mSv
☢ 		0.03-0.3 mSv [ped]
☢☢ 		Usually not appropriate
FDG-PET/CT whole body
10-30 mSv
☢☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		Usually not appropriate
Fluoride PET/CT whole body
10-30 mSv
☢☢☢☢ 		3-10 mSv [ped]
☢☢☢☢ 		Usually not appropriate