FDG-PET/CT Whole Body There is insufficient evidence to support the use of FDG-PET/CT for the assessment of periprosthetic soft-tissue abnormalities. Fluoride PET/CT Whole Body There is insufficient evidence to support the use of fluoride PET/CT for the assessment of periprosthetic soft-tissue abnormalities. Fluoroscopy Knee There is insufficient evidence to support the use of fluoroscopy for the assessment of periprosthetic soft-tissue abnormalities. MRI Knee Without IV Contrast MRI that uses robust metal reduction techniques can be used for evaluation of quadriceps or patellar tendinopathy in patients with TKA [152] and for evaluation of arthrofibrosis [93]. MRI can also demonstrate suprapatellar arthrofibrosis that can be associated with post TKA patellar clunk syndrome [147]. The presence of MRI measurable abundant thick fibrotic tissue in patients with a clinical diagnosis of knee fibrosis is of benefit to knee surgeons faced with patients with stiff TKA and can facilitate the decision to debride the knee, restore range of motion, and revise the implant [153]. MRI is beneficial for the workup of periarticular soft-tissue masses, including neoplastic masses and inflammatory pseudotumors [154]. US Knee US can be used for evaluation of quadriceps or patellar tendinopathy [155-157], postsurgical arthrofibrosis [158], and periarticular soft-tissue masses in patients with TKA. One review discusses the use of dynamic US to look for causes of snapping knee, including patellar clunk, snapping popliteus, and snapping related to component/liner malposition [159]. A case report discussed the utility of using dynamic US for the workup of patellar clunk syndrome [160]. WBC Scan and Sulfur Colloid Scan Knee There is insufficient evidence to support the use of In-111 WBC and Tc-99m sulfur colloid studies for the assessment of periprosthetic soft-tissue abnormalities.
Imaging After Total Knee Arthroplasty. FDG-PET/CT Whole Body There is insufficient evidence to support the use of FDG-PET/CT for the assessment of periprosthetic soft-tissue abnormalities. Fluoride PET/CT Whole Body There is insufficient evidence to support the use of fluoride PET/CT for the assessment of periprosthetic soft-tissue abnormalities. Fluoroscopy Knee There is insufficient evidence to support the use of fluoroscopy for the assessment of periprosthetic soft-tissue abnormalities. MRI Knee Without IV Contrast MRI that uses robust metal reduction techniques can be used for evaluation of quadriceps or patellar tendinopathy in patients with TKA [152] and for evaluation of arthrofibrosis [93]. MRI can also demonstrate suprapatellar arthrofibrosis that can be associated with post TKA patellar clunk syndrome [147]. The presence of MRI measurable abundant thick fibrotic tissue in patients with a clinical diagnosis of knee fibrosis is of benefit to knee surgeons faced with patients with stiff TKA and can facilitate the decision to debride the knee, restore range of motion, and revise the implant [153]. MRI is beneficial for the workup of periarticular soft-tissue masses, including neoplastic masses and inflammatory pseudotumors [154]. US Knee US can be used for evaluation of quadriceps or patellar tendinopathy [155-157], postsurgical arthrofibrosis [158], and periarticular soft-tissue masses in patients with TKA. One review discusses the use of dynamic US to look for causes of snapping knee, including patellar clunk, snapping popliteus, and snapping related to component/liner malposition [159]. A case report discussed the utility of using dynamic US for the workup of patellar clunk syndrome [160]. WBC Scan and Sulfur Colloid Scan Knee There is insufficient evidence to support the use of In-111 WBC and Tc-99m sulfur colloid studies for the assessment of periprosthetic soft-tissue abnormalities.