Advanced MRI Techniques for the Hip Joint: Focus on the Postoperative Hip

Abstract

OBJECTIVE Imaging the hip joint with optimized MRI protocol parameters provides the radiologist with the ability to reliably diagnose complex hip abnormalities. The institution of appropriate metal artifact reduction techniques and dedicated sequences can enhance visualization of the periprosthetic bone and soft tissues and allow improved detection of the more frequently encountered total hip arthroplasty–related conditions, such as mechanical loosening, polyethylene wear, and adverse local tissue reactions. CONCLUSION Finally, through the use of dynamic contrast-enhanced MRI, abnormal femoral head perfusion, one of the most common complications associated with femoral neck fracture internal fixation, can be detected before the development of femoral head osteonecrosis, subchondral collapse, and secondary osteoarthritis. Thus, through the institution of the techniques described in this review article, the challenges associated with MRI of hip arthroplasty and instrumentation can be overcome, allowing for the diagnosis of common associated complications.

Imaging of Total Ankle Arthroplasty: Normal Imaging Findings and Hardware Complications

“…108 Several vendor-specific metal artifact reduction techniques have been very helpful in significantly reducing metal artifact around orthopaedic devices, allowing better assessment of the periprosthetic tissues. 109,110 Hayter et al published data on 122 patients with hip, knee, and shoulder arthroplasties in which they found the multi-acquisition variableresonance image combination (MAVRIC) sequence outperformed traditional fast spin-echo (FSE) techniques for assessing the synovium in the affected joint, as well as the prosthesis-bone interface. 111 Recently, de Cesar Netto et al published a report on 40 patients with TAA comparing a compressed sensing slice encoding in metal artifact reduction (CS-SEMAC) technique with traditional high bandwidth techniques.…”

Conventional and Arthrographic Magnetic Resonance Techniques for Hip Evaluation: What the Radiologist Should Know

“…Artifacts are most pronounced in the presence of stainless steel, followed by cobalt, chromium, and titanium implants. 39 There are some basic modifications for artifact reduction. Because artifacts increase with field strength, 1.5-T magnets are preferred over 3-T magnets.…”

Discovery of biomarkers to identify peri‐implant osteolysis before radiographic diagnosis

“…patient reported pain). Clinically, plain radiography is typically used for diagnosis, but detection of small osteolytic lesions is better served by cross-sectional imaging 6 . Currently, revision surgery is the only treatment for aseptic loosening caused by osteolysis.…”

“…Clinically, plain radiography is typically used for diagnosis, but detection of small osteolytic lesions is better served by cross-sectional imaging. 6 Currently, revision surgery is the only treatment for aseptic loosening caused by osteolysis. Revision surgeries are associated with higher failure rates, 7 higher patient mortality rates, 8 and worse pain and functional outcomes 9 than primary TJR.…”