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Home Soft Tissue Masses
Variants
Scenario Scenario ID Procedure Adult RRL Peds RRL Appropriateness Category
Soft tissue mass, knee, radiography and noncontrast US nondiagnostic, next imaging study 3196262
MRI knee without and with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually 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
CT knee without and with IV contrast
<0.1 mSv
☢ 		0.03-0.3 mSv [ped]
☢☢ 		May be appropriate
US knee with IV contrast
0 mSv
O 		0 mSv [ped]
O 		Usually not appropriate
Image-guided biopsy knee

Varies
Varies 		Usually not appropriate
Image-guided fine needle aspiration knee

Varies
Varies 		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